arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1406.5697cond-mat.str-el
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二维重空穴的朗道量子化、Rashba自旋轨道耦合和塞曼分裂

Landau quantization, Rashba spin-orbit coupling and Zeeman splitting of two-dimensional heavy holes

S. A. Moskalenko, I. V. Podlesny, E. V. Dumanov, M. A. Liberman, B. V. Novikov

摘要:

讨论了在周期晶格势中运动的二维电子和空穴在垂直磁场和电场作用下g因子的来源。精确求解了描述具有非抛物色散规律的二维重空穴的朗道量子化、Rashba自旋轨道耦合(RSOC)和塞曼分裂(ZS)的泡利方程。由于旋量型波函数的存在,这些解具有朗道量子化能级对的形式。能级取决于磁场和电场的振幅、g因子{g-h}和非抛物性参数C。任意两个能级对塞曼参数{Z_h}={g_h}{m_h}/4{m_0}(其中{m_h}为空穴有效质量)的依赖关系是非单调的,没有交叉点。在C=0时,它们之间的最小距离发生在值{Z_h}=n/2处,其中n是由RSOC确定的手性项的阶数,并且对于朗道量子化的任何量子数都是相同的。

英文摘要:

The origin of the g-factor of the two-dimensional (2D) electrons and holes moving in the periodic crystal lattice potential with the perpendicular magnetic and electric fields is discussed. The Pauli equation describing the Landau quantization accompanied by the Rashba spin-orbit coupling (RSOC) and Zeeman splitting (ZS) for 2D heavy holes with nonparabolic dispersion law is solved exactly. The solutions have the form of the pairs of the Landau quantization levels due to the spinor-type wave functions. The energy levels depend on amplitudes of the magnetic and electric fields, on the g-factor {g-h}, and on the parameter of nonparabolicity C. The dependences of two energy levels in any pair on the Zeeman parameter {Z_h}={g_h}{m_h}/4{m_0}, where {m_h} is the hole effective mass, are nonmonotonous and without intersections. The smallest distance between them at C=0 takes place at the value {Z_h}=n/2, where n is the order of the chirality terms determined by the RSOC and is the same for any quantum number of the Landau quantization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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