//www.getgobooth.com/ 必威体育下载 daily 15 2024-08-20 10:33:36 apsoffice@iphy.ac.cn apsoffice@iphy.ac.cn 2024-08-20 10:33:36 zh Copyright ©Acta Physica Sinica All Rights Reserved. 京ICP备05002789号-1 Address: PostCode：100190 Phone: 010-82649829，82649241,82649863 Email: apsoffice@iphy.ac.cn Copyright ©Acta Physica Sinica All Rights Reserved apsoffice@iphy.ac.cn 1000-3290 //www.getgobooth.com/en/article/doi/10.7498/aps.48.977 Author(s): ZHANG SI-MING, YE FEI <br/><p>We explore the time evolution of BEC condensates under different condition by solving the time-dependent nonlinear Schr?dinger equation (NLSE) that describes an inhomogeneous, weakly interacting Bose-Einstein condensate at zero temperature. We present numerical results of interference of two condensates which have different number of atoms in them and examine the evolution of a Bose-Einstein condensate which has split into two parts.</p> <br/>Acta Physica Sinica. 1999 48(6): 977-982. Published 1999-03-05 Author(s): ZHANG SI-MING, YE FEI <br/><p>We explore the time evolution of BEC condensates under different condition by solving the time-dependent nonlinear Schr?dinger equation (NLSE) that describes an inhomogeneous, weakly interacting Bose-Einstein condensate at zero temperature. We present numerical results of interference of two condensates which have different number of atoms in them and examine the evolution of a Bose-Einstein condensate which has split into two parts.</p> <br/>Acta Physica Sinica. 1999 48(6): 977-982. Published 1999-03-05 A NUMERICAL SIMULATION OF THE INTERFERENCE IN BEC ZHANG SI-MING, YE FEI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 977-982. article doi:10.7498/aps.48.977 10.7498/aps.48.977 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.977 977-982 //www.getgobooth.com/en/article/doi/10.7498/aps.48.983 Author(s): GUO HUA <br/><p>By use of algebraic method, the exact solution of the time-dependent Dirac equation was obtained, and the exchange symmetry in the solution was discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 983-986. Published 1999-03-05 Author(s): GUO HUA <br/><p>By use of algebraic method, the exact solution of the time-dependent Dirac equation was obtained, and the exchange symmetry in the solution was discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 983-986. Published 1999-03-05 EXACT SOLUTION OF THE TIME-DEPENDENT DIRAC EQUATION GUO HUA 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 983-986. article doi:10.7498/aps.48.983 10.7498/aps.48.983 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.983 983-986 //www.getgobooth.com/en/article/doi/10.7498/aps.48.987 Author(s): MA TAO, NI ZHI-XIANG <br/><p>Using ideas of supersymmetric quantum mechanics, two new classes of conditionally exactly solvable potentials are constructed from the displaced harmonic oscillator potential. The supersymmetry as well as the space symmetry is broken in one class of them. Furthermore we construct the nonlinear spectrum-generating algebras for them.</p> <br/>Acta Physica Sinica. 1999 48(6): 987-991. Published 1999-03-05 Author(s): MA TAO, NI ZHI-XIANG <br/><p>Using ideas of supersymmetric quantum mechanics, two new classes of conditionally exactly solvable potentials are constructed from the displaced harmonic oscillator potential. The supersymmetry as well as the space symmetry is broken in one class of them. Furthermore we construct the nonlinear spectrum-generating algebras for them.</p> <br/>Acta Physica Sinica. 1999 48(6): 987-991. Published 1999-03-05 TWO NEW CLASSES OF CONDITIONALLY EXACTLY SOLVABLE POTENTIAL AND THEIR NONLINEAR SPECTRUM-GENERATING ALGEBRAS MA TAO, NI ZHI-XIANG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 987-991. article doi:10.7498/aps.48.987 10.7498/aps.48.987 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.987 987-991 //www.getgobooth.com/en/article/doi/10.7498/aps.48.992 Author(s): CHEN GUANG <br/><p>The conformal flat space-time solutions in electromagnetic and scalar theory are shown, and the indefiniteness of the plane-symmetric solutions and the method for defining a noncontinuous field by the intersection of multi-solutions are demonstrated.</p> <br/>Acta Physica Sinica. 1999 48(6): 992-994. Published 1999-03-05 Author(s): CHEN GUANG <br/><p>The conformal flat space-time solutions in electromagnetic and scalar theory are shown, and the indefiniteness of the plane-symmetric solutions and the method for defining a noncontinuous field by the intersection of multi-solutions are demonstrated.</p> <br/>Acta Physica Sinica. 1999 48(6): 992-994. Published 1999-03-05 CONFORMAL FLAT SPACE-TIME SOLUTIONS IN ELECTROMAGNETIC AND SCALAR THEORY CHEN GUANG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 992-994. article doi:10.7498/aps.48.992 10.7498/aps.48.992 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.992 992-994 //www.getgobooth.com/en/article/doi/10.7498/aps.48.995 Author(s): YI XUE-XI <br/><p>The BEC in finite-number trapped atoms is investigated in this paper. The results show that the transition temperature is decreased by the finite-number effect, and the interactions between the atoms change the transition temperature, too. The specific heat below the transition point is no longer proportional to T3/2. In addition to the above effects, the distribution of the trapped atoms depend on its number. The repulsive interaction between the atoms also dilute the density of the atoms.</p> <br/>Acta Physica Sinica. 1999 48(6): 995-1002. Published 1999-03-05 Author(s): YI XUE-XI <br/><p>The BEC in finite-number trapped atoms is investigated in this paper. The results show that the transition temperature is decreased by the finite-number effect, and the interactions between the atoms change the transition temperature, too. The specific heat below the transition point is no longer proportional to T3/2. In addition to the above effects, the distribution of the trapped atoms depend on its number. The repulsive interaction between the atoms also dilute the density of the atoms.</p> <br/>Acta Physica Sinica. 1999 48(6): 995-1002. Published 1999-03-05 BOSE-EINSTEIN CONDENSATION IN FINITE-NUMBEF TRAPPED ATOMS YI XUE-XI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 995-1002. article doi:10.7498/aps.48.995 10.7498/aps.48.995 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.995 995-1002 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1003 Author(s): XUE YU, CHEN GUANG-ZHI <br/><p>We discussed the kinetics of n-polymer aggregation processes with source-reinforced, The asymptotic expression of Cm(t) is obtained by the steady-state solution of generalized Smolu-chovski's equation with source. Universal power law distributions of cluster size are obtained in gelling systems.</p> <br/>Acta Physica Sinica. 1999 48(6): 1003-1010. Published 1999-03-05 Author(s): XUE YU, CHEN GUANG-ZHI <br/><p>We discussed the kinetics of n-polymer aggregation processes with source-reinforced, The asymptotic expression of Cm(t) is obtained by the steady-state solution of generalized Smolu-chovski's equation with source. Universal power law distributions of cluster size are obtained in gelling systems.</p> <br/>Acta Physica Sinica. 1999 48(6): 1003-1010. Published 1999-03-05 n-POLYMER IREEVERSIBLE KINETIC AGGREGATION WITH SOURCE-REINFORCED XUE YU, CHEN GUANG-ZHI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1003-1010. article doi:10.7498/aps.48.1003 10.7498/aps.48.1003 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1003 1003-1010 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1011 Author(s): FU JIAN, GAO XIAO-CHUN, XU JING-BO, ZOU XU-BO <br/><p>On the basis of the generalized invariant formulation, the invariant-related unitary transformation method is used to study the evolution of the quantum Dirac field in a time-dependent spatially homogeneous electric field. We solve the functional Schr?dinger equation for the Dirac field and obtain the exact solutions and corresponding total phase. The total phase includes both the dynamical phase and geometric phase (Aharonov-Anandan phase).</p> <br/>Acta Physica Sinica. 1999 48(6): 1011-1022. Published 1999-03-05 Author(s): FU JIAN, GAO XIAO-CHUN, XU JING-BO, ZOU XU-BO <br/><p>On the basis of the generalized invariant formulation, the invariant-related unitary transformation method is used to study the evolution of the quantum Dirac field in a time-dependent spatially homogeneous electric field. We solve the functional Schr?dinger equation for the Dirac field and obtain the exact solutions and corresponding total phase. The total phase includes both the dynamical phase and geometric phase (Aharonov-Anandan phase).</p> <br/>Acta Physica Sinica. 1999 48(6): 1011-1022. Published 1999-03-05 INVARIANT-RELATED UNITARY TRANSFORMATION METHOD AND EXACT SOLUTIONS FOR THE QUANTUM DIRAC FIELD IN A TIME-DEPENDENT SPATIALLY HOMOGENEOUS ELECTRIC FIELD FU JIAN, GAO XIAO-CHUN, XU JING-BO, ZOU XU-BO 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1011-1022. article doi:10.7498/aps.48.1011 10.7498/aps.48.1011 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1011 1011-1022 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1023 Author(s): WANG YING-SONG, XU ZHI-ZHAN <br/><p>High-order harmonic spectra are obtained by numerically solving the one-dimension time-dependent Schr?dinger equation with single-active-electron approximation. The influence of the initial phase of the excitation field on the single-atom high harmonic generation is analysized through Gabor analysis of the acceleration of the atomic dipole. The influence of the initial phase on the process of the high harmonic generation stronger for the shorter-duration pulses than for the longer case. A pulse train or a single pulse of subfemtosecond level could be obtained by high harmonic generation through the adjustment of the phase of the excitation laser field.</p> <br/>Acta Physica Sinica. 1999 48(6): 1023-1029. Published 1999-03-05 Author(s): WANG YING-SONG, XU ZHI-ZHAN <br/><p>High-order harmonic spectra are obtained by numerically solving the one-dimension time-dependent Schr?dinger equation with single-active-electron approximation. The influence of the initial phase of the excitation field on the single-atom high harmonic generation is analysized through Gabor analysis of the acceleration of the atomic dipole. The influence of the initial phase on the process of the high harmonic generation stronger for the shorter-duration pulses than for the longer case. A pulse train or a single pulse of subfemtosecond level could be obtained by high harmonic generation through the adjustment of the phase of the excitation laser field.</p> <br/>Acta Physica Sinica. 1999 48(6): 1023-1029. Published 1999-03-05 PHASE-DEPENDENCE OF HIGH-ORDER HARMONIC SPECTRA WITH ULTRASHORT LASER PULSES WANG YING-SONG, XU ZHI-ZHAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1023-1029. article doi:10.7498/aps.48.1023 10.7498/aps.48.1023 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1023 1023-1029 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1030 Author(s): YU XI-FENG, HU HUO-SHENG, HE LI-DUAN, JIANG ZHENG, LIU XIANG, HU ZHUANG-QI <br/><p>Sn-Bi nanometer powders were produced by an electrohydrodynamic technique. The microstructural feature of Sn-Bi nanometer powders was investigated by means of XRD, TEM and HREM. The results show that Sn-Bi nanometer powders produced are composed of tetragonal β-Sn monophase supersaturated solid solution and rhombohedral Bi monophase supersaturated solid solution. Most of the Sn-Bi nanometer powders are single crytals, only a few Sn-Bi nanometer powders are twin crystals. The particles of﹤10nm in diameter are perfect single crystals. There exist dislocations in the particles larger than 10nm in diameter. The formation mechanism of microstructure for Sn-Bi nanometer powders is analyzed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1030-1036. Published 1999-03-05 Author(s): YU XI-FENG, HU HUO-SHENG, HE LI-DUAN, JIANG ZHENG, LIU XIANG, HU ZHUANG-QI <br/><p>Sn-Bi nanometer powders were produced by an electrohydrodynamic technique. The microstructural feature of Sn-Bi nanometer powders was investigated by means of XRD, TEM and HREM. The results show that Sn-Bi nanometer powders produced are composed of tetragonal β-Sn monophase supersaturated solid solution and rhombohedral Bi monophase supersaturated solid solution. Most of the Sn-Bi nanometer powders are single crytals, only a few Sn-Bi nanometer powders are twin crystals. The particles of﹤10nm in diameter are perfect single crystals. There exist dislocations in the particles larger than 10nm in diameter. The formation mechanism of microstructure for Sn-Bi nanometer powders is analyzed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1030-1036. Published 1999-03-05 MICROSTRUCTURAL FEATURE OF NANOPHASE Sn-Bi PARTICLES PRODUCED BY AN ELECTROHYDRODYNAMIC TECHNIQUE YU XI-FENG, HU HUO-SHENG, HE LI-DUAN, JIANG ZHENG, LIU XIANG, HU ZHUANG-QI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1030-1036. article doi:10.7498/aps.48.1030 10.7498/aps.48.1030 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1030 1030-1036 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1037 Author(s): JIANG ZE-HUI, HE XIAO-DONG, HAN JIE-CAI, DU SHAN-YI <br/><p>When a cluster of particles is immersed in a uniform electric field, the particles are coupled to-gether due to the mutual interaction among them. This interaction causes the dipole moment of the cluster to be dependent upon the spatial arrangement and relative permittivity of the particles and up-on the cluster size. In this work, we attempt to estimate the dipole moment of finite cubic arrays of particles, in terms of that of particle chains which has been known. We assume that a chain may be replaced by a single equivalent sphere with the same dipole moment. With replacing the chain by equivalent sphere, a cluster is simplified to a planar array, and this planar array is simplified to a chain, then the dipole moment is obtained. Numerical calculations are performed. It is found that our results are acceptable.</p> <br/>Acta Physica Sinica. 1999 48(6): 1037-1043. Published 1999-03-05 Author(s): JIANG ZE-HUI, HE XIAO-DONG, HAN JIE-CAI, DU SHAN-YI <br/><p>When a cluster of particles is immersed in a uniform electric field, the particles are coupled to-gether due to the mutual interaction among them. This interaction causes the dipole moment of the cluster to be dependent upon the spatial arrangement and relative permittivity of the particles and up-on the cluster size. In this work, we attempt to estimate the dipole moment of finite cubic arrays of particles, in terms of that of particle chains which has been known. We assume that a chain may be replaced by a single equivalent sphere with the same dipole moment. With replacing the chain by equivalent sphere, a cluster is simplified to a planar array, and this planar array is simplified to a chain, then the dipole moment is obtained. Numerical calculations are performed. It is found that our results are acceptable.</p> <br/>Acta Physica Sinica. 1999 48(6): 1037-1043. Published 1999-03-05 AN ESTIMATE OF THE DIPOLE MOMENT OF PARTICLE CLUSTERS JIANG ZE-HUI, HE XIAO-DONG, HAN JIE-CAI, DU SHAN-YI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1037-1043. article doi:10.7498/aps.48.1037 10.7498/aps.48.1037 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1037 1037-1043 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1044 Author(s): HE QI-CAI, HUANG YAO-XIONG <br/><p>The problem of reflection and transmission of an electromagnetic plane wave incident from a dielectric medium, reflected and transmitted by another dielectric medium which moving in an arbitrary direction is analyzed in detail. The field vectors of the reflected and transmitted waves, and the reflection and transmission coefficients as well as the energy relations are deduced for the reflected, transmitted and incident waves. In particular, the properties of the force exerted on the moving medium by a plane wave are discussed in comparison with the case in which the incident space is free space and some new phenomenon are suggested for notice.</p> <br/>Acta Physica Sinica. 1999 48(6): 1044-1051. Published 1999-03-05 Author(s): HE QI-CAI, HUANG YAO-XIONG <br/><p>The problem of reflection and transmission of an electromagnetic plane wave incident from a dielectric medium, reflected and transmitted by another dielectric medium which moving in an arbitrary direction is analyzed in detail. The field vectors of the reflected and transmitted waves, and the reflection and transmission coefficients as well as the energy relations are deduced for the reflected, transmitted and incident waves. In particular, the properties of the force exerted on the moving medium by a plane wave are discussed in comparison with the case in which the incident space is free space and some new phenomenon are suggested for notice.</p> <br/>Acta Physica Sinica. 1999 48(6): 1044-1051. Published 1999-03-05 THE GENERAL SOLUTION FOR THE PROBLEM OF A PLANE ELECTROMAGNETIC WAVE REFLECTED AND TRANSMITTED FROM THE INTERFACE BETWEEN A STATIONARY DIELECTRIC MEDIUM AND A DIELECTRIC MEDIUM MOVING IN AN ARBITRARY DIRECTION HE QI-CAI, HUANG YAO-XIONG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1044-1051. article doi:10.7498/aps.48.1044 10.7498/aps.48.1044 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1044 1044-1051 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1052 Author(s): LI JUN-QING, LI CHUN-FEI, XIN LI, LIU SHU-TIAN, T.M.IL’INOVA, N.I.KOROTEEV <br/><p>A nonconductive isotropic chiral medium is described by using classical electromagnetic theroy. The phenomenon of nonlinear optical activity of a linearly polarized aignal light under the action of a circularly polarized pump light is investigated. The expressions of nonlinear optical rotational angle are given. The calculated results using the expressions are in accordance to the experimental results.</p> <br/>Acta Physica Sinica. 1999 48(6): 1052-1059. Published 1999-03-05 Author(s): LI JUN-QING, LI CHUN-FEI, XIN LI, LIU SHU-TIAN, T.M.IL’INOVA, N.I.KOROTEEV <br/><p>A nonconductive isotropic chiral medium is described by using classical electromagnetic theroy. The phenomenon of nonlinear optical activity of a linearly polarized aignal light under the action of a circularly polarized pump light is investigated. The expressions of nonlinear optical rotational angle are given. The calculated results using the expressions are in accordance to the experimental results.</p> <br/>Acta Physica Sinica. 1999 48(6): 1052-1059. Published 1999-03-05 MACROSCOPIC THEORY OF NONLINEAR OPTICAL ACTIVITY IN A NONCONDUCTIVE ISOTROPIC CHIRAL MEDIUM LI JUN-QING, LI CHUN-FEI, XIN LI, LIU SHU-TIAN, T.M.IL’INOVA, N.I.KOROTEEV 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1052-1059. article doi:10.7498/aps.48.1052 10.7498/aps.48.1052 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1052 1052-1059 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1060 Author(s): GAO YAN-XIA, FAN DIANG-YUAN <br/><p>In this paper, from the structure feature of the Fibonacci super-lattice, based on the principles of self phase modulation (SPM) and group velocity dispersion (GVD), we make use of the split step FFT method, conduct an investigation in SPM and the effects of higher order GVD to spectral devel-opment and temporal shaping of ultra-short pulses propagating in the Fibonacci super-lattice. It is shown, when the ultra-short pulses propagating in the Fibonacci super-lattice, because of SPM and GVD, the evolution of the pulse shape and development of the spectra are asymmetric. With increasing length of the super-lattice, the pulse will split into two separate sub-pulses, and the pulse spectra may also split.</p> <br/>Acta Physica Sinica. 1999 48(6): 1060-1065. Published 1999-03-05 Author(s): GAO YAN-XIA, FAN DIANG-YUAN <br/><p>In this paper, from the structure feature of the Fibonacci super-lattice, based on the principles of self phase modulation (SPM) and group velocity dispersion (GVD), we make use of the split step FFT method, conduct an investigation in SPM and the effects of higher order GVD to spectral devel-opment and temporal shaping of ultra-short pulses propagating in the Fibonacci super-lattice. It is shown, when the ultra-short pulses propagating in the Fibonacci super-lattice, because of SPM and GVD, the evolution of the pulse shape and development of the spectra are asymmetric. With increasing length of the super-lattice, the pulse will split into two separate sub-pulses, and the pulse spectra may also split.</p> <br/>Acta Physica Sinica. 1999 48(6): 1060-1065. Published 1999-03-05 ULTRA-SHORT PULSE PROPAGATING IN FIBONACCI QUASI-PERIODIC OPTICAL SUPER-LATTICE INFLUENCED BY GVD AND SPM GAO YAN-XIA, FAN DIANG-YUAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1060-1065. article doi:10.7498/aps.48.1060 10.7498/aps.48.1060 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1060 1060-1065 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1066 Author(s): CHEN GANG-JIN, XIA ZHONG-FU, ZHANG YE-WEN <br/><p>In this papet the interaction characteristics between space charge and dipole in the host-guest nonlinear optical polymer electret DR1/PMMA films are studied by means of the open-circuit thermal stimulate discharge(TSD) technique and measurements of the isothermal surface potential decay and the electro-optical effect. The results indicate that there are two kinds of charges：space and dipole in the poled material, the energy level for most of the space charge trapped by the traps of sample is higher than the bound level of dipole charge originating from the dipole alignment after suitable heat than the bound level of dipole charge originating from the dipole alignment after suitable heat treatment, and there is a strong interaction between space charge and dipole. The decay of space charge will cause the change of charge distribution in the materials, which subsequently leads to relaxation of the dipoles. The stability of space charge trapped in the material significantly affects the life of dipole alignment for the material.</p> <br/>Acta Physica Sinica. 1999 48(6): 1066-1071. Published 1999-03-05 Author(s): CHEN GANG-JIN, XIA ZHONG-FU, ZHANG YE-WEN <br/><p>In this papet the interaction characteristics between space charge and dipole in the host-guest nonlinear optical polymer electret DR1/PMMA films are studied by means of the open-circuit thermal stimulate discharge(TSD) technique and measurements of the isothermal surface potential decay and the electro-optical effect. The results indicate that there are two kinds of charges：space and dipole in the poled material, the energy level for most of the space charge trapped by the traps of sample is higher than the bound level of dipole charge originating from the dipole alignment after suitable heat than the bound level of dipole charge originating from the dipole alignment after suitable heat treatment, and there is a strong interaction between space charge and dipole. The decay of space charge will cause the change of charge distribution in the materials, which subsequently leads to relaxation of the dipoles. The stability of space charge trapped in the material significantly affects the life of dipole alignment for the material.</p> <br/>Acta Physica Sinica. 1999 48(6): 1066-1071. Published 1999-03-05 THE INTERACTION CHARACTERISTICS BETWEEN SPACE CHARGE AND DIPOLE IN THE HOST-GUEST NLO POLYMER ELECTRET DR1/PMMA FILMS CHEN GANG-JIN, XIA ZHONG-FU, ZHANG YE-WEN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1066-1071. article doi:10.7498/aps.48.1066 10.7498/aps.48.1066 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1066 1066-1071 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1072 Author(s): WANG LONG <br/><p>The growth process of microsize charged grains is investigated. Two growth mechanisms of collecting ion flow and coagulation are considered, in which the latter dominates and forms a monodisperse distribution of grain size. A simplified physical model has been suggested on the basis of energy equipartition theorem and a dynamic equation for the distribution function of grain size has been deduced. The preliminary computational results are in agreement with the above consideration on the growth mechanisms.</p> <br/>Acta Physica Sinica. 1999 48(6): 1072-1077. Published 1999-03-05 Author(s): WANG LONG <br/><p>The growth process of microsize charged grains is investigated. Two growth mechanisms of collecting ion flow and coagulation are considered, in which the latter dominates and forms a monodisperse distribution of grain size. A simplified physical model has been suggested on the basis of energy equipartition theorem and a dynamic equation for the distribution function of grain size has been deduced. The preliminary computational results are in agreement with the above consideration on the growth mechanisms.</p> <br/>Acta Physica Sinica. 1999 48(6): 1072-1077. Published 1999-03-05 A MODEL FOR THE GROWTH OF GRAINS IN A PLASMA WANG LONG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1072-1077. article doi:10.7498/aps.48.1072 10.7498/aps.48.1072 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1072 1072-1077 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1078 Author(s): GU YU-PENG, GONG YE, SUN JI-ZHONG <br/><p>The interaction between particle and temperature fields of AC plasma arc is studied. Attention is given to the interaction and its effects on temperature fields and particle's thermal history. The effect of convection is also discussed. It is demonstrated that such interaction is improtant and the particle can increase the stability of arc column and the convection decrease it.</p> <br/>Acta Physica Sinica. 1999 48(6): 1078-1085. Published 1999-03-05 Author(s): GU YU-PENG, GONG YE, SUN JI-ZHONG <br/><p>The interaction between particle and temperature fields of AC plasma arc is studied. Attention is given to the interaction and its effects on temperature fields and particle's thermal history. The effect of convection is also discussed. It is demonstrated that such interaction is improtant and the particle can increase the stability of arc column and the convection decrease it.</p> <br/>Acta Physica Sinica. 1999 48(6): 1078-1085. Published 1999-03-05 INTERACTION BETWEEN PARTICLE AND TEMPERATURE FIELDS OF AC PLASMA ARC GU YU-PENG, GONG YE, SUN JI-ZHONG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1078-1085. article doi:10.7498/aps.48.1078 10.7498/aps.48.1078 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1078 1078-1085 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1086 Author(s): LI QUN-XIANG, YANG JIN-LONG, DING CHANG-GENG, WANG KE-LIN, LI JIA-MING <br/><p>The roles of STM tungsten tip and external static electric field in single corner silicon adatom extracting from Si(111)-7×7 surface are studied using discrete variational-local density functional (DV-LDF) method with cluster models. The binding energy and the different charge density distri-bution of the system are calculated under various conditions. The results show that, the activation barrier decreasing is a chemical effect due to the procimity of the eletrodes. The effect of external electric field depends on its polarity. A monotonous decrease in the activation barrier is seen for positive bias case, while a small increasing is seen for negative bias case. The single corner silicon adatom cannot transfer from the sample surface if only considering the role of the static interaction among the tip, external electric field and sample surface. The mechanisms of atomic manipulation on semiconductor surfaces are discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1086-1094. Published 1999-03-05 Author(s): LI QUN-XIANG, YANG JIN-LONG, DING CHANG-GENG, WANG KE-LIN, LI JIA-MING <br/><p>The roles of STM tungsten tip and external static electric field in single corner silicon adatom extracting from Si(111)-7×7 surface are studied using discrete variational-local density functional (DV-LDF) method with cluster models. The binding energy and the different charge density distri-bution of the system are calculated under various conditions. The results show that, the activation barrier decreasing is a chemical effect due to the procimity of the eletrodes. The effect of external electric field depends on its polarity. A monotonous decrease in the activation barrier is seen for positive bias case, while a small increasing is seen for negative bias case. The single corner silicon adatom cannot transfer from the sample surface if only considering the role of the static interaction among the tip, external electric field and sample surface. The mechanisms of atomic manipulation on semiconductor surfaces are discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1086-1094. Published 1999-03-05 ROLES OF STM TIP AND EXTERNAL ELECTRIC FIELD IN THE SINGLE ATOM MANIPULATION ON Si(111)-7×7 SURFACE LI QUN-XIANG, YANG JIN-LONG, DING CHANG-GENG, WANG KE-LIN, LI JIA-MING 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1086-1094. article doi:10.7498/aps.48.1086 10.7498/aps.48.1086 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1086 1086-1094 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1095 Author(s): LIANG FENG, YAN XUE-JIAN <br/><p>We present the structure features of diamond-like films, discuss the relation between the coefficients in the preparation of diamond-like films and analyse how these coefficients affect the structure and property of the films in detail.</p> <br/>Acta Physica Sinica. 1999 48(6): 1095-1102. Published 1999-03-05 Author(s): LIANG FENG, YAN XUE-JIAN <br/><p>We present the structure features of diamond-like films, discuss the relation between the coefficients in the preparation of diamond-like films and analyse how these coefficients affect the structure and property of the films in detail.</p> <br/>Acta Physica Sinica. 1999 48(6): 1095-1102. Published 1999-03-05 PROPERTY, APPLICATION AND PREPARATION OF DIAMOND-LIKE FILM LIANG FENG, YAN XUE-JIAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1095-1102. article doi:10.7498/aps.48.1095 10.7498/aps.48.1095 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1095 1095-1102 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1103 Author(s): WANG JIN, YANG KUN, JIN CHAN <br/><p>We have investigated the structure of the crystal LiNbO3: MgO at both low temperature and room temperature. The results showed that the crystal structure had changed little after doping of Mg2+. At room temperature the lattice showed distorted a little, which caused the appearance of overlaping of some individual scattering peaks. As the temperature decreased, the overlaping reduced gradually.</p> <br/>Acta Physica Sinica. 1999 48(6): 1103-1106. Published 1999-03-05 Author(s): WANG JIN, YANG KUN, JIN CHAN <br/><p>We have investigated the structure of the crystal LiNbO3: MgO at both low temperature and room temperature. The results showed that the crystal structure had changed little after doping of Mg2+. At room temperature the lattice showed distorted a little, which caused the appearance of overlaping of some individual scattering peaks. As the temperature decreased, the overlaping reduced gradually.</p> <br/>Acta Physica Sinica. 1999 48(6): 1103-1106. Published 1999-03-05 A STUDY ON THE STRUCTURE OF THE CRYSTAL LiNbO3:MgO WANG JIN, YANG KUN, JIN CHAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1103-1106. article doi:10.7498/aps.48.1103 10.7498/aps.48.1103 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1103 1103-1106 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1107 Author(s): HU XIN-WEN, ZHAO JUN, LU HUI-QING, LI XIANG-YANG, FANG JIA-XIONG <br/><p>Admittance Spectroscopy (AS) measurements have been performed on n+-on-p Hg1-xCdxTe(x=0.6) photodiodes. Before gamma-irradiation, a deep level located 0.15 eV above the valence band is observed, its trap density Nt=4.8×1015cm-3 with the capture cross section of approximately 2.2×10-17cm2, which is probablely induced by a compound defect correlated with Hg vacancy. After 104 Gy gamma-irradiation, a new trap center located 0.19 eV above the valence band is found, and the pre-irradiation trap level 0.15 eV above the valence band is no longer seen. The trap densities for these two levels are almost the same. This defect level change ultimately makes the device performance deteriorated.</p> <br/>Acta Physica Sinica. 1999 48(6): 1107-1112. Published 1999-03-05 Author(s): HU XIN-WEN, ZHAO JUN, LU HUI-QING, LI XIANG-YANG, FANG JIA-XIONG <br/><p>Admittance Spectroscopy (AS) measurements have been performed on n+-on-p Hg1-xCdxTe(x=0.6) photodiodes. Before gamma-irradiation, a deep level located 0.15 eV above the valence band is observed, its trap density Nt=4.8×1015cm-3 with the capture cross section of approximately 2.2×10-17cm2, which is probablely induced by a compound defect correlated with Hg vacancy. After 104 Gy gamma-irradiation, a new trap center located 0.19 eV above the valence band is found, and the pre-irradiation trap level 0.15 eV above the valence band is no longer seen. The trap densities for these two levels are almost the same. This defect level change ultimately makes the device performance deteriorated.</p> <br/>Acta Physica Sinica. 1999 48(6): 1107-1112. Published 1999-03-05 GAMMA IRRADIATION ON ROOM TEMPERATURE SHOPR-WAVELENGTH HgCdTe PHOTOVOLTAIC DEVICE STUDIED BY ADMITTANCE SPECTROSCOPY HU XIN-WEN, ZHAO JUN, LU HUI-QING, LI XIANG-YANG, FANG JIA-XIONG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1107-1112. article doi:10.7498/aps.48.1107 10.7498/aps.48.1107 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1107 1107-1112 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1113 Author(s): YANG ZHI-AN, JIN TAO, YANG ZU-SHEN, QUI RE-XI, CUI MING-QI, LIU FENG-QIN <br/><p>Changes of surface electronic states of InP under 1 keV X-ray irradiation is studied by X-ray photoelectron spectroscopy (XPS) and ultraviolet ray energy spectroscopy (UPS). Our results show that the soft X-ray irradiation has little effect on In atoms but much on P atoms. We analysed the mechanism of irradiation and explained the major effect.</p> <br/>Acta Physica Sinica. 1999 48(6): 1113-1117. Published 1999-03-05 Author(s): YANG ZHI-AN, JIN TAO, YANG ZU-SHEN, QUI RE-XI, CUI MING-QI, LIU FENG-QIN <br/><p>Changes of surface electronic states of InP under 1 keV X-ray irradiation is studied by X-ray photoelectron spectroscopy (XPS) and ultraviolet ray energy spectroscopy (UPS). Our results show that the soft X-ray irradiation has little effect on In atoms but much on P atoms. We analysed the mechanism of irradiation and explained the major effect.</p> <br/>Acta Physica Sinica. 1999 48(6): 1113-1117. Published 1999-03-05 CHANGES OF SURFACE ELECTRON STATES OF InP UNDER SOFT X-RAYS IRRADIATION YANG ZHI-AN, JIN TAO, YANG ZU-SHEN, QUI RE-XI, CUI MING-QI, LIU FENG-QIN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1113-1117. article doi:10.7498/aps.48.1113 10.7498/aps.48.1113 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1113 1113-1117 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1126 Author(s): TANG XIAO-MING, WEI SAI-ZHEN, MAO ZU-SUI, CHEN XIAO-FENG, ZHENG YONG-MIND <br/><p>In this article Au was deposited on PVF(Polyviny formal) film which was kept at 253 K to grow Au submonolayer film. It is found that there are special areas whose morphology differs from other's experiment in which metal was deposited on single crystal. In these areas especially big clusters were found and they were surrounded by empty bands. Our deduction that this is caused by variation of local coefficient is proved by a modified DDA(Deposition-Diffusion-Aggregation) model which includes edge diffusion. We also argue that the relationship between cluster diffusion coefficient DS, and particles numbers S which the cluster contains should be exponential for Au cluster on PVF film instead of power-dependent in original DDA model.</p> <br/>Acta Physica Sinica. 1999 48(6): 1126-1131. Published 1999-03-05 Author(s): TANG XIAO-MING, WEI SAI-ZHEN, MAO ZU-SUI, CHEN XIAO-FENG, ZHENG YONG-MIND <br/><p>In this article Au was deposited on PVF(Polyviny formal) film which was kept at 253 K to grow Au submonolayer film. It is found that there are special areas whose morphology differs from other's experiment in which metal was deposited on single crystal. In these areas especially big clusters were found and they were surrounded by empty bands. Our deduction that this is caused by variation of local coefficient is proved by a modified DDA(Deposition-Diffusion-Aggregation) model which includes edge diffusion. We also argue that the relationship between cluster diffusion coefficient DS, and particles numbers S which the cluster contains should be exponential for Au cluster on PVF film instead of power-dependent in original DDA model.</p> <br/>Acta Physica Sinica. 1999 48(6): 1126-1131. Published 1999-03-05 EFFECT OF LOCAL DIFFUSION COEFFICIENT VARIATION ON SUBMONOLAYER GROWTH TANG XIAO-MING, WEI SAI-ZHEN, MAO ZU-SUI, CHEN XIAO-FENG, ZHENG YONG-MIND 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1126-1131. article doi:10.7498/aps.48.1126 10.7498/aps.48.1126 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1126 1126-1131 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1132 Author(s): CHUAN XIU-YUN, CHEN DAI-ZHANG, ZHOU XUN-RUO, JIANG JIA-JI, LI HE-JUN <br/><p>The electrical property of 1—4 stages of intercalation compounds of CuCl2, which were synthesized with 2—3μｍ graphite powder, was measured by the four-probe method. Their conductivity was 1.5—2.2 times as that of their host material, graphite. The higher the stage, the higher the conductivity. The microanalysis of chemical compounds by the X-ray energy spectrum scanning analysis of TEM testified that the atom ratio of chlorine and cupric was non-stoichoimetric. The vacancy of the chlorine anion the GICs increased the concentration of the carrier particle. They link up in c-axis, and enlarged the activity space of the carrier particle. The exchange of the electrovalence of the cupric ion has been testified by XPS-ESCA. Graphite and chloride in the stage structure, seem to be the conductor and insulator, which form the “sandwich” structure. This special structure produced a weak chemical bond belt and provided the carrier space in the perpendicular direction to the c-axis. These factors in and vertical to the direction of c-axis together increased the electrical properties.</p> <br/>Acta Physica Sinica. 1999 48(6): 1132-1137. Published 1999-03-05 Author(s): CHUAN XIU-YUN, CHEN DAI-ZHANG, ZHOU XUN-RUO, JIANG JIA-JI, LI HE-JUN <br/><p>The electrical property of 1—4 stages of intercalation compounds of CuCl2, which were synthesized with 2—3μｍ graphite powder, was measured by the four-probe method. Their conductivity was 1.5—2.2 times as that of their host material, graphite. The higher the stage, the higher the conductivity. The microanalysis of chemical compounds by the X-ray energy spectrum scanning analysis of TEM testified that the atom ratio of chlorine and cupric was non-stoichoimetric. The vacancy of the chlorine anion the GICs increased the concentration of the carrier particle. They link up in c-axis, and enlarged the activity space of the carrier particle. The exchange of the electrovalence of the cupric ion has been testified by XPS-ESCA. Graphite and chloride in the stage structure, seem to be the conductor and insulator, which form the “sandwich” structure. This special structure produced a weak chemical bond belt and provided the carrier space in the perpendicular direction to the c-axis. These factors in and vertical to the direction of c-axis together increased the electrical properties.</p> <br/>Acta Physica Sinica. 1999 48(6): 1132-1137. Published 1999-03-05 THE ELECTRICAL PROPERTY AND ITS MECHANISM OF INTERCALATION COMPOUNDS OF CuCl2 CHUAN XIU-YUN, CHEN DAI-ZHANG, ZHOU XUN-RUO, JIANG JIA-JI, LI HE-JUN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1132-1137. article doi:10.7498/aps.48.1132 10.7498/aps.48.1132 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1132 1132-1137 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1138 Author(s): XIONG YE <br/><p>We use Lanczos exact diagonalization method to analyze the energy and the wave functions of exciton states in one-dimensional semiconductor polymer with electron-electron interactions. On the basis of this we further calculate the effect of the local lattice distortion on the exciton states and luminescent properties and find that the efficiency of luminescence is proportional to the strength of local lattice distortion under special electron-electron interaction parameters.</p> <br/>Acta Physica Sinica. 1999 48(6): 1138-1146. Published 1999-03-05 Author(s): XIONG YE <br/><p>We use Lanczos exact diagonalization method to analyze the energy and the wave functions of exciton states in one-dimensional semiconductor polymer with electron-electron interactions. On the basis of this we further calculate the effect of the local lattice distortion on the exciton states and luminescent properties and find that the efficiency of luminescence is proportional to the strength of local lattice distortion under special electron-electron interaction parameters.</p> <br/>Acta Physica Sinica. 1999 48(6): 1138-1146. Published 1999-03-05 EXCITON STATES AND LUMINESCENT PROPERTIES IN ONE-DIMENSIONAL SEMICONDUCTOR POLYMER AND THE EFFECT OF LATTICE DISTORTION XIONG YE 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1138-1146. article doi:10.7498/aps.48.1138 10.7498/aps.48.1138 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1138 1138-1146 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1147 Author(s): WU BAI-MEI, YANG DONG-SHENG, SHENG SONG, XU WEI-MING, CHEN ZHAO-JIA <br/><p>The thermal conductivity and the electrical conductivity of Cr75FexMn25-x(x=16,18) alloys have been measured over the temperatures range from 77K to 300K. The change of slope on thermal conductivity-temperature curve and the maximum on electrical conductivity-temperature curve have been found near the transition temperature of spin density wave type antiferromagnetism, which is related to the opening of the energy gap. Both alloys exhibit a rise in the phonon thermal eonductivity with decreasing temperature as being characteristic of umklapp processes.</p> <br/>Acta Physica Sinica. 1999 48(6): 1147-1151. Published 1999-03-05 Author(s): WU BAI-MEI, YANG DONG-SHENG, SHENG SONG, XU WEI-MING, CHEN ZHAO-JIA <br/><p>The thermal conductivity and the electrical conductivity of Cr75FexMn25-x(x=16,18) alloys have been measured over the temperatures range from 77K to 300K. The change of slope on thermal conductivity-temperature curve and the maximum on electrical conductivity-temperature curve have been found near the transition temperature of spin density wave type antiferromagnetism, which is related to the opening of the energy gap. Both alloys exhibit a rise in the phonon thermal eonductivity with decreasing temperature as being characteristic of umklapp processes.</p> <br/>Acta Physica Sinica. 1999 48(6): 1147-1151. Published 1999-03-05 THERMAL CONDUCTIVITY OF Cr75FexMn25-x(x=16,18) ALLOYS WU BAI-MEI, YANG DONG-SHENG, SHENG SONG, XU WEI-MING, CHEN ZHAO-JIA 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1147-1151. article doi:10.7498/aps.48.1147 10.7498/aps.48.1147 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1147 1147-1151 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1152 Author(s): XU KE-XI, YU LI-MING, A.A.ESSA, ZHOU SHI-PING, BAO JIA-SHAN <br/><p>The characteristic of microwave radiation (λ＝8mm) response of YBCO granular films was reported. Experimental results show that the response behavior can be described with nonequilibrium response effect, instead of thermal effect model. Near below the transition temperature T∞, nonequilibrium microwave response signal decays gradually and disappears with the sample resistance becoming zero. It was also found that the response signal is very sensitive to a weak magnetic field. The sample I-V curve was studied carefully, and the Kosterlitz-Thouless transition model can be used to describe the two-dimensional transport characteristic of the YBCO granular films. Based on the analysis and experimental results, we believe that the mechanism of nonequilibrium microwave response may be related with the breaking of the votex-antivotex pair in high Tc superconductor.</p> <br/>Acta Physica Sinica. 1999 48(6): 1152-1162. Published 1999-03-05 Author(s): XU KE-XI, YU LI-MING, A.A.ESSA, ZHOU SHI-PING, BAO JIA-SHAN <br/><p>The characteristic of microwave radiation (λ＝8mm) response of YBCO granular films was reported. Experimental results show that the response behavior can be described with nonequilibrium response effect, instead of thermal effect model. Near below the transition temperature T∞, nonequilibrium microwave response signal decays gradually and disappears with the sample resistance becoming zero. It was also found that the response signal is very sensitive to a weak magnetic field. The sample I-V curve was studied carefully, and the Kosterlitz-Thouless transition model can be used to describe the two-dimensional transport characteristic of the YBCO granular films. Based on the analysis and experimental results, we believe that the mechanism of nonequilibrium microwave response may be related with the breaking of the votex-antivotex pair in high Tc superconductor.</p> <br/>Acta Physica Sinica. 1999 48(6): 1152-1162. Published 1999-03-05 NONEQUILIBRIUM MICROWAVE RESPONSE AND KOSTERLITZ-THOULESS TRANSITION IN YBCO GRANULAR FILMS XU KE-XI, YU LI-MING, A.A.ESSA, ZHOU SHI-PING, BAO JIA-SHAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1152-1162. article doi:10.7498/aps.48.1152 10.7498/aps.48.1152 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1152 1152-1162 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1163 Author(s): ZHAO JUN-QING, WEI JIAN-HUA, WANG SHOU-GUO, XIE SHI-JIE, MEI LIANG-MO <br/><p>Spin density wave in organic ferromagnets with open ends was studied and the results were compared with that in a closed organic ferromagnet ring. It was found that an end-open chain structure is unfavorable for the formation of the ferromagnetic ground. The competition of electron-electron interactions and the π-electron-radical spin couplings and their different effect on the SDW in the main chain were discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1163-1169. Published 1999-03-05 Author(s): ZHAO JUN-QING, WEI JIAN-HUA, WANG SHOU-GUO, XIE SHI-JIE, MEI LIANG-MO <br/><p>Spin density wave in organic ferromagnets with open ends was studied and the results were compared with that in a closed organic ferromagnet ring. It was found that an end-open chain structure is unfavorable for the formation of the ferromagnetic ground. The competition of electron-electron interactions and the π-electron-radical spin couplings and their different effect on the SDW in the main chain were discussed.</p> <br/>Acta Physica Sinica. 1999 48(6): 1163-1169. Published 1999-03-05 SPIN DENSITY WAVE OF ORGANIC FERROMAGNETS WITH OPEN ENDS ZHAO JUN-QING, WEI JIAN-HUA, WANG SHOU-GUO, XIE SHI-JIE, MEI LIANG-MO 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1163-1169. article doi:10.7498/aps.48.1163 10.7498/aps.48.1163 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1163 1163-1169 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1170 Author(s): FANG QING-QING, ZHONG WEI, DU YU-WEI <br/><p>Using XRD and TEM techniques, the modification mechanism of Fe3O4-SrFe12O19 particles has been studied. We have also studied the growth mechanism of spinel phase coating overlayer, and demonstrated that there exists a strong exchange coupling between coating overleyer and core particles due to the complexation of Fe2+ ions in suspension and Fe3+ ions extracted from the core particles. After modification, crystal structure and magnetic properties of SiFe12O19 particles were modified.</p> <br/>Acta Physica Sinica. 1999 48(6): 1170-1174. Published 1999-03-05 Author(s): FANG QING-QING, ZHONG WEI, DU YU-WEI <br/><p>Using XRD and TEM techniques, the modification mechanism of Fe3O4-SrFe12O19 particles has been studied. We have also studied the growth mechanism of spinel phase coating overlayer, and demonstrated that there exists a strong exchange coupling between coating overleyer and core particles due to the complexation of Fe2+ ions in suspension and Fe3+ ions extracted from the core particles. After modification, crystal structure and magnetic properties of SiFe12O19 particles were modified.</p> <br/>Acta Physica Sinica. 1999 48(6): 1170-1174. Published 1999-03-05 MODIFICATION STUDIES ON CAOTING Sr-FERRITE NANOPARTICLES FANG QING-QING, ZHONG WEI, DU YU-WEI 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1170-1174. article doi:10.7498/aps.48.1170 10.7498/aps.48.1170 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1170 1170-1174 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1175 Author(s): LI ZI-RONG, MENG QING-AN, GUAN DI-HUA, WANG GANG <br/><p>The self diffusion coefficients D of lithium ions in PAN-EC/PC-LiClO4 gel polymer electrolytes with different compositions and at different temperatures have been directly measured by field gradient NMR spin echo technique. The results indicated that self diffusion coefficients D of lithium ions were dependent on the mass ratio x% of lithium salt, and had a maxiumum at x=10 in the range of x=5 to 20. It was suggested that this was probably involved with transport mechanisms of the hopping of lithium ions, and with two kinds of interactions: the interaction between Li+ ions and plasticizer EC, and the interaction between Li+ ions and network polymer PAN.</p> <br/>Acta Physica Sinica. 1999 48(6): 1175-1178. Published 1999-03-05 Author(s): LI ZI-RONG, MENG QING-AN, GUAN DI-HUA, WANG GANG <br/><p>The self diffusion coefficients D of lithium ions in PAN-EC/PC-LiClO4 gel polymer electrolytes with different compositions and at different temperatures have been directly measured by field gradient NMR spin echo technique. The results indicated that self diffusion coefficients D of lithium ions were dependent on the mass ratio x% of lithium salt, and had a maxiumum at x=10 in the range of x=5 to 20. It was suggested that this was probably involved with transport mechanisms of the hopping of lithium ions, and with two kinds of interactions: the interaction between Li+ ions and plasticizer EC, and the interaction between Li+ ions and network polymer PAN.</p> <br/>Acta Physica Sinica. 1999 48(6): 1175-1178. Published 1999-03-05 NMR STUDIES ON SELF DIFFUSION COEFFICIENTS OF LITHIUM IONS IN PAN-BASED GEL POLYMER ELECTROLYTES LI ZI-RONG, MENG QING-AN, GUAN DI-HUA, WANG GANG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1175-1178. article doi:10.7498/aps.48.1175 10.7498/aps.48.1175 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1175 1175-1178 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1179 Author(s): WANG WEN-JUN, XU JIAN-HUA, LU XIANG-ZE, WANG GONG-MING, WANG WEN-CHENG <br/><p>The optical anisotropy of organic molecular films induced by molecular reorientation was investi-gated by using the perturbation method.We presented theoretical formulae about the dependence of second harmonic generation (SHG) intensity on the polarization of fundamental beam.SHG beam and the dipping direc tion.The experimental studies and discussion were given under some special conditions.The expermental results agreed well with the theoretical calculation.</p> <br/>Acta Physica Sinica. 1999 48(6): 1179-1184. Published 1999-03-05 Author(s): WANG WEN-JUN, XU JIAN-HUA, LU XIANG-ZE, WANG GONG-MING, WANG WEN-CHENG <br/><p>The optical anisotropy of organic molecular films induced by molecular reorientation was investi-gated by using the perturbation method.We presented theoretical formulae about the dependence of second harmonic generation (SHG) intensity on the polarization of fundamental beam.SHG beam and the dipping direc tion.The experimental studies and discussion were given under some special conditions.The expermental results agreed well with the theoretical calculation.</p> <br/>Acta Physica Sinica. 1999 48(6): 1179-1184. Published 1999-03-05 PERTURBATION THEORY AND EXPERIMENTAL STUDIES ON ANISOTROPY OF ORGANIC MOLECULAR FILMS WANG WEN-JUN, XU JIAN-HUA, LU XIANG-ZE, WANG GONG-MING, WANG WEN-CHENG 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 1179-1184. article doi:10.7498/aps.48.1179 10.7498/aps.48.1179 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.1179 1179-1184 //www.getgobooth.com/en/article/doi/10.7498/aps.48.11118 Author(s): WANG YOU-NIAN <br/><p>We simulate the Coulomb explosion patterns for swift H+2 ions penetrating through solids by solving the equations of motion. The forces acting on individual fragments are given by the stopping force and the dynamic interacting force. With the plasmon-pole approximation dielectric function, the linear-response dielectric theory is used to determine the dynamic interacting force. The initial directions of the molecular axis with respect to the beam direction are assumed to be random. It is found that due to the dynamic-interaction effects, the molecular axes tend to align to the beam direction and the energy losses of the trailing ions are larger than that of the leading ions.</p> <br/>Acta Physica Sinica. 1999 48(6): 011118. Published 1999-03-05 Author(s): WANG YOU-NIAN <br/><p>We simulate the Coulomb explosion patterns for swift H+2 ions penetrating through solids by solving the equations of motion. The forces acting on individual fragments are given by the stopping force and the dynamic interacting force. With the plasmon-pole approximation dielectric function, the linear-response dielectric theory is used to determine the dynamic interacting force. The initial directions of the molecular axis with respect to the beam direction are assumed to be random. It is found that due to the dynamic-interaction effects, the molecular axes tend to align to the beam direction and the energy losses of the trailing ions are larger than that of the leading ions.</p> <br/>Acta Physica Sinica. 1999 48(6): 011118. Published 1999-03-05 DYNAMIC INTERACTING FORCE AND EVOLUTION OF COULOMB EXPLOSION PATTERNS FOR SWIFT H+2 PENETRATING THROUGH SOLIDS WANG YOU-NIAN 1999-03-05 Personal use only, all commercial or other reuse prohibited Acta Physica Sinica. 1999 48(6): 011118. article doi:10.7498/aps.48.11118 10.7498/aps.48.11118 Acta Physica Sinica 48 6 1999-03-05 //www.getgobooth.com/en/article/doi/10.7498/aps.48.11118 011118

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