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题名: Spin Hall effect on the kagome lattice with Rashba spin-orbit interaction
作者: Liu GC;  Zhang P;  Wang ZG;  Li SSS
发表日期: 2009
摘要: We study the spin Hall effect in the kagome lattice with Rashba spin-orbit coupling. The conserved spin Hall conductance sigma(s)(xy) (see text) and its two components, i.e., the conventional term sigma(s0)(xy) and the spin-torque-dipole term sigma(s tau)(xy), are numerically calculated, which show a series of plateaus as a function of the electron Fermi energy epsilon(F). A consistent two-band analysis, as well as a Berry-phase interpretation, is also given. We show that these plateaus are a consequence of various Fermi-surface topologies when tuning epsilon(F). In particular, we predict that compared to the case with the Fermi surface encircling the Gamma point in the Brillouin zone, the amplitude of the spin Hall conductance with the Fermi surface encircling the K points is twice enhanced, which makes it highly meaningful in the future to systematically carry out studies of the K-valley spintronics.
KOS主题词: Quantum theory;  Fermi level;  Fermi surface;  Hall effect;  spin-orbit interactions
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Liu GC ; Zhang P ; Wang ZG ; Li SSS .Spin Hall effect on the kagome lattice with Rashba spin-orbit interaction ,PHYSICAL REVIEW B,2009 ,79(3):Art. No. 035323
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