中国物理B ›› 2009, Vol. 18 ›› Issue (8): 3523-3529.doi: 10.1088/1674-1056/18/8/064

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Kinetic magnetoelectric effect in laterally boundary-confined ballistic two-dimensional hole gases

黄海涛, 胡梁宾, 张新定, 朱诗亮   

  1. Laboratory of Quantum Information Technology, Institute for Condensed Matter Physics, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631, China
  • 收稿日期:2008-08-26 修回日期:2009-03-23 出版日期:2009-08-20 发布日期:2009-08-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10874049), the State Key Program for Basic Research of China (Grant No 2007CB925204) and the Natural Science Foundation of Guangdong Province of China ( Grant No 07005834).

The kinetic magnetoelectric effect in laterally boundary-confined ballistic two-dimensional hole gases

Huang Hai-Tao(黄海涛), Hu Liang-Bin(胡梁宾)† and Zhang Xin-Ding(张新定), and Zhu Shi-Liang(朱诗亮)   

  1. Laboratory of Quantum Information Technology, Institute for Condensed Matter Physics, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631, China
  • Received:2008-08-26 Revised:2009-03-23 Online:2009-08-20 Published:2009-08-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10874049), the State Key Program for Basic Research of China (Grant No 2007CB925204) and the Natural Science Foundation of Guangdong Province of China ( Grant No 07005834).

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摘要： A theoretical investigation is presented on the characteristics of the kinetic magnetoelectric effect in laterally boundary-confined ballistic two-dimensional hole gases. It was shown that, though the momentum-dependent effective magnetic fields felt by charge carriers due to the spin-orbit interaction are in-plane orientated in such systems, both in-plane polarized and normal polarized nonequilibrium spin polarization densities could be electrically induced by the kinetic magnetoelectric effect, and the induced nonequilibrium spin polarizations exhibit some interesting characteristics. The characteristics we found indicate that there may be some possible relation between this effect and some recent experimental findings.

Abstract: A theoretical investigation is presented on the characteristics of the kinetic magnetoelectric effect in laterally boundary-confined ballistic two-dimensional hole gases. It was shown that, though the momentum-dependent effective magnetic fields felt by charge carriers due to the spin-orbit interaction are in-plane orientated in such systems, both in-plane polarized and normal polarized nonequilibrium spin polarization densities could be electrically induced by the kinetic magnetoelectric effect, and the induced nonequilibrium spin polarizations exhibit some interesting characteristics. The characteristics we found indicate that there may be some possible relation between this effect and some recent experimental findings.

Key words: spin-orbit coupling, electrically induced spin polarization, two-dimensional hole gas

中图分类号:  (Magnetomechanical effects, magnetostriction)

  • 75.80.+q
73.23.Ad (Ballistic transport) 73.63.-b (Electronic transport in nanoscale materials and structures)