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Characteristics of anomalous Hall effect in spin-polarized two-dimensional electron gases in the presence of both intrinsic, extrinsic, and external electric-field induced spin–orbit couplings |
Liu Song(刘宋), Yan Yu-Zhen(颜玉珍), and Hu Liang-Bin(胡梁宾)† |
Laboratory of Quantum Information Technology, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631, China |
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Abstract The various competing contributions to the anomalous Hall effect in spin-polarized two-dimensional electron gases in the presence of both intrinsic, extrinsic and external electric-field induced spin-orbit coupling were investigated theoretically. Based on a unified semiclassical theoretical approach, it is shown that the total anomalous Hall conductivity can be expressed as the sum of three distinct contributions in the presence of these competing spin-orbit interactions, namely an intrinsic contribution determined by the Berry curvature in the momentum space, an extrinsic contribution determined by the modified Bloch band group velocity and an extrinsic contribution determined by spin-orbit-dependent impurity scattering. The characteristics of these competing contributions are discussed in detail in the paper.
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Received: 15 July 2011
Revised: 23 October 2011
Accepted manuscript online:
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PACS:
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72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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72.20.-i
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(Conductivity phenomena in semiconductors and insulators)
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73.50.Jt
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(Galvanomagnetic and other magnetotransport effects)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10874049). |
Corresponding Authors:
Hu Liang-Bin,lbhu26@yahoo.com
E-mail: lbhu26@yahoo.com
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Cite this article:
Liu Song(刘宋), Yan Yu-Zhen(颜玉珍), and Hu Liang-Bin(胡梁宾) Characteristics of anomalous Hall effect in spin-polarized two-dimensional electron gases in the presence of both intrinsic, extrinsic, and external electric-field induced spin–orbit couplings 2012 Chin. Phys. B 21 027201
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