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Abstract

A kind of spintronics is designed by doping the transition metal into Si clusters. Their spin-polarized electron transport properties are investigated by using the first principle analysis. Calculation shows that Fe, Cr and Mn atom doped clusters give the largest spin-polarized transmission coefficients in all the clusters. From Sc to Ni doped clusters, spin filter efficiencies of the systems increase gradually, and the maximal spin filter coefficiency appears in the Fe doped system. The ability to induce the spin-polarized electron transport of the cluster in junction is not cosistent with the magnetic moment of cluster under isolated states.

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Funds:Project supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20106101110017), the Foundation of Shanghai Education Committee, China (Grant No. 060Z018), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2009JQ1004), the Special Item Foundation of Educational Committee of Shaanxi Province, China (Grant No. 08JK471), and the Open Foundation of Cultivation Base of the State Key Lab of Optoelectronic Technology and Functional Materials Co-constructed by Ministry of Education and Northwest University, Shaanxi Province, China (Grant No. zs12022).

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Vol. 62, Issue 8 - 2013-04-20

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