Electrical and thermal transport of heavy Fermion superconductor CeRh<sub>2</sub>As<sub>2</sub>

WAN Zhenzhe; WANG Hanru; WANG Jing; GRZEGORZ Chajewski; DARIUSZ Kaczorowski; LI Shiyan

doi:10.7498/aps.74.20250391

Abstract

CeRh₂As₂, as a recently discovered Ce-based 122-type heavy-fermion superconductor, has attracted much attention due to its non-Fermi-liquid behavior and two-phase superconductivity. The tetragonal crystal structure of CeRh₂As₂ maintains global centrosymmetry, which makes even-parity and odd-parity superconducting states different rather than mixed. The Ce site exhibits local inversion symmetry breaking, which results in staggered Rashba spin-orbit coupling. This may lead to the c axis field-induced transition between two superconducting phases and high critical field. Given the novel physics in CeRh₂As₂, including a possible quantum critical point and a spin-fluctuation-mediated superconducting pairing mechanism, the ultra-low-temperature electrical and thermal transport properties of CeRh₂As₂ under various magnetic fields are investigated in this work. The zero-field resistivity reveals a superconducting transition at the critical temperature T_c = 0.34 K. At a magnetic field of 1 T, a minimum resistivity appears near T₀$ \approx $0.42 K, which may be due to partial gap opening caused by Fermi surface nesting, indicating that the system enters into a magnetically ordered state, which is not observed in zero field. In the temperature range from T₀ to 2 K, the system exhibits non-Fermi-liquid behavior $ \rho\sim{{T}}^{0.44} $, indicating proximity to a quantum critical point. The superconducting transition is fully suppressed at 7 T, with resistivity recovering Fermi-liquid behavior at low temperature. No significant anomaly is observed in the zero-field thermal conductivity of CeRh₂As₂ near T_c. This absence of anomaly may be attributed to the high residual resistivity of the sample, and the reduction in carrier density during the superconducting transition and the T₀ phase transition. It requires optimizing single crystal growth to reduce the effects of lattice defects or chemical disorder on thermal transport. Upon applying magnetic field, the thermal conductivity curve exhibits a small upward shift relative to its zero-field curve. At 0.15 K, thermal conductivity rises with the increase of magnetic field and is saturated at higher fields (above 5 T). In the normal state at 7 T, it is found that the electrical resistivity and thermal conductivity satisfy the Wiedemann-Franz law, indicating that both charge and heat transport are governed by the same quasiparticles, which is consistent with the Fermi-liquid behavior observed in resistivity under this field.

Keywords:

heavy-fermion superconductor /
CeRh₂As₂ /
electrical resistivity /
ultra-low-temperature thermal conductivity

Authors and contacts

Corresponding author: LI Shiyan, shiyan_li@fudan.edu.cn

Funds: Project supported by the National Key R&D Program of China (Grant No. 2022YFA1402203) and the National Natural Science Foundation of China (Grant No. 12174064).

FullText HTML

References

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

Cited By

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

DownLoad: Full-Size Img PowerPoint

map

[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
[16]
[17]
[18]
[19]
[20]
[21]
[22]
[23]
[24]
[25]
[26]
[27]
[28]
[29]
[30]
[31]
[32]
[33]
[34]
[35]
[36]
[37]
[38]

[1]	ZHU Shaoping. Unified derivation of laser energy deposition coefficient, electron thermal conduction coefficient and resistivity in plasma. Acta Physica Sinica, 2025, 74(12): 125201. doi: 10.7498/aps.74.20250340
[2]	Li Hong-Ming, Dong Chuang, Wang Qing, Li Xiao-Na, Zhao Ya-Jun, Zhou Da-Yu. Correlation between electrical resistivity and strength of copper alloy and material classification. Acta Physica Sinica, 2019, 68(1): 016101. doi: 10.7498/aps.68.20181498
[3]	Li Qing, Wang Min-Xiang, Liu Tong, Mu Qing-Ge, Ren Zhi-An, Li Shi-Yan. Superconducting gap of quasi-one-dimensional Cr-based superconductor RbCr3As3. Acta Physica Sinica, 2018, 67(20): 207411. doi: 10.7498/aps.67.20181692
[4]	Wu You-Cheng, Liu Gao-Min, Dai Wen-Feng, Gao Zhi-Peng, He Hong-Liang, Hao Shi-Rong, Deng Jian-Jun. Dynamic resistivity of Pb(Zr0.95Ti0.05)O3 depolarized ferroelectric under shock wave compression. Acta Physica Sinica, 2017, 66(4): 047201. doi: 10.7498/aps.66.047201
[5]	Li Rui, Zuo Xiao-Wei, Wang En-Gang. Microstructure, resistivity, and hardness of aged Ag-7wt.%Cu alloy. Acta Physica Sinica, 2017, 66(2): 027401. doi: 10.7498/aps.66.027401
[6]	Sun Li-Jun, Dai Fei, Luo Jiang-Shan, Yi Yong, Yang Meng-Sheng, Zhang Ji-Cheng, Li Jun, Lei Hai-Le. Electrical resistivity of nanostructured aluminum at low temperature. Acta Physica Sinica, 2016, 65(13): 137303. doi: 10.7498/aps.65.137303
[7]	Liu Ya-Jie. Prediction of the magneto-resistivity of manganese oxides La0.67Ca0.33MnO3 and Pr0.7Sr0.3MnO3 via temperature and magnetic field. Acta Physica Sinica, 2013, 62(1): 017601. doi: 10.7498/aps.62.017601
[8]	Chen Yan, Liu Lin, Liu Jian-Hua, Zhang Rui-Jun. Effect of high pressure treatment on microstructure and resistivity of Cu75.15Al24.85 alloy. Acta Physica Sinica, 2012, 61(17): 176103. doi: 10.7498/aps.61.176103
[9]	Luo Xiao-Dong, Di Guo-Qing. Ge and Nb co-doped TiO2 films with narrow band gap and low resistivity prepared by sputtering. Acta Physica Sinica, 2012, 61(20): 206803. doi: 10.7498/aps.61.206803
[10]	Zhang Zhi-Guo. SnO2:(Cu,In) films with high transmittance in ultraviolet region. Acta Physica Sinica, 2010, 59(11): 8172-8177. doi: 10.7498/aps.59.8172
[11]	Zhang Ming-Xiao, Tian Xue-Lei, Guo Feng-Xiang. Design and application of a device based on electromagnetic induction principle for electrical resistivity qualitative measurement of liquid and solid metals. Acta Physica Sinica, 2009, 58(9): 6080-6085. doi: 10.7498/aps.58.6080
[12]	Fan Fei, Ban Chun-Yan, Wang Yang, Ba Qi-Xian, Cui Jian-Zhong. The resistivity evolution with temperature of 7050 aluminium alloy by different casting methods. Acta Physica Sinica, 2009, 58(1): 638-643. doi: 10.7498/aps.58.638
[13]	Bie Shao-Wei, Jiang Jian-Jun, Ma Qiang, Du Gang, Yuan Lin, Di Yong-Jiang, Feng Ze-Kun, He Hua-Hui. Soft magnetic properties and microwave permeability of multilayer nanogranular films with high resistivity. Acta Physica Sinica, 2008, 57(4): 2514-2518. doi: 10.7498/aps.57.2514
[14]	Zhai Qiu-Ya, Yang Yang, Xu Jin-Feng, Guo Xue-Feng. Electrical resistivity and mechanical properties of rapidly solidified Cu-Sn hypoperitectic alloys. Acta Physica Sinica, 2007, 56(10): 6118-6123. doi: 10.7498/aps.56.6118
[15]	Wang Yuan, Xu Ke-Wei. Cu-W Thin film characterized by surface fractal and resistivity. Acta Physica Sinica, 2004, 53(3): 900-904. doi: 10.7498/aps.53.900
[16]	Long Yun-Ze, Chen Zhao-Jia, Zhang Zhi-Ming, Wan Mei-Xiang, Zheng Ping, Wang Nan-Lin, He Chao-Hui, Geng Bin, Yang Hai-Liang, Chen Xiao-Hua, Wang Yan-Ping, Li Guo-Zheng. Resistivity and magnetic susceptibility of nanotubular polyaniline doped with protonic acids. Acta Physica Sinica, 2003, 52(1): 175-179. doi: 10.7498/aps.52.175
[17]	Yang Hong-Shun, Li Peng-Cheng, Cai Yi-Sheng, Yu Min, Li Zhi-Quan, Yang Dong-Sheng, Zhang Liang, Wang Yu-Hong, Li Ming-De, Cao Lie-Zhao, Long Yun-Zhe, Chen Zhao-Jia. . Acta Physica Sinica, 2002, 51(3): 679-684. doi: 10.7498/aps.51.679
[18]	WANG QIANG, LU KUN-QUAN, LI YAN-XIANG. THE RELATIONSHIP BETWEEN ELECTRICAL RESISTIVITY, THERMOPOWER AND TEMPERATURE FOR LIQUID InSb. Acta Physica Sinica, 2001, 50(7): 1355-1358. doi: 10.7498/aps.50.1355
[19]	LI HUI-LING, RUAN KE-QING, LI SHI-YAN, MO WEI-QIN, FAN RONG, LUO XI-GANG, CHEN XIAN-HUI, CAO LIE-ZHAO. STUDY ON THE RESISTIVITY AND HALL EFFECT OF MgB2 AND Mg0.93Li0.07B2. Acta Physica Sinica, 2001, 50(10): 2044-2048. doi: 10.7498/aps.50.2044
[20]	YANG HONG-SHUN, YU MIN, LI SHI-YAN, LI PENG-CHENG, CHAI YI SHENG, ZHANG LIANG, CHEN XIAN-HUI, CAO LIE-ZHAO. STUDY ON THE THERMOPOWER AND RESISTIVITY OF A NEW SUPERCONDUCTOR MgB2. Acta Physica Sinica, 2001, 50(6): 1197-1200. doi: 10.7498/aps.50.1197

Catalog

Vol. 74, Issue 12 - 2025-06-20

Metrics

Abstract views: 599
PDF Downloads: 97
Cited By: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: LI Shiyan, shiyan_li@fudan.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Authors

Referees

About Journal

About

Search

Article

留言板

Abstract

Authors and contacts

Corresponding author: LI Shiyan, shiyan_li@fudan.edu.cn

FullText HTML

References

Cited By

Catalog

Metrics

Publishing process

Authors

Referees

About Journal

About