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Suppression of Direct Spin Hall Currents in Two-Dimensional Electronic Systems with both Rashba and Dresselhaus Spin-Orbit Couplings |
| XIONG Jian-Wen1,2;HU Liang-Bin2;ZHANG Zhen-Xi1 |
| 1The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049
2Department of Physics, South China Normal University, Guangzhou 510631 |
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| Cite this article: |
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XIONG Jian-Wen, HU Liang-Bin, ZHANG Zhen-Xi 2006 Chin. Phys. Lett. 23 1278-1281 |
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Abstract Based on the Heisenberg equations of motion for the electron orbital and spin degrees of freedom in two-dimensional electronic systems with both Rashba and Dresselhaus spin-orbit couplings, we show that an ac electric field can cause an ac spin Hall current in such a system. In contrast to some previous theoretical prediction, the spin Hall current will be suppressed completely in the dc limit. We argue that the suppression of dc spin Hall currents in such a system is actually a much natural result of the dynamic spin evolution due to the combined action of a dc external electric field and the intrinsic spin-orbit coupling.
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| Keywords:
72.10.-d
72.15.Gd
73.50.Jt
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Published: 01 May 2006
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| PACS: |
72.10.-d
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(Theory of electronic transport; scattering mechanisms)
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72.15.Gd
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(Galvanomagnetic and other magnetotransport effects)
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73.50.Jt
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(Galvanomagnetic and other magnetotransport effects)
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