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題名:	Transverse force generated by an electric field and transverse charge imbalance in spin-orbit coupled systems
作者:	Chen, Tsung-Wei 許琇娟 Hsu, Hsiu-Chuan Guo, Guang-Yu
貢獻者:	應物所
日期:	2009-09
上傳時間:	2019-08-15 10:56:33 (UTC+8)
摘要:	We use linear response theory to study the transverse force generated by an external electric field and hence possible charge Hall effect in spin-orbit coupled systems. In addition to the Lorentz force that is parallel to the electric field, we find that the transverse force perpendicular to the applied electric field may not vanish in a system with an anisotropic energy dispersion. Surprisingly, in contrast to the previous results, the transverse force generated by the electric field does not depend on the spin current, but in general, it is related to the second derivative of energy dispersion only. Furthermore, we find that the transverse force does not vanish in the Rashba-Dresselhaus system. Therefore, the non-vanishing transverse force acts as a driving force and results in charge imbalance at the edges of the sample. The estimated ratio of the Hall voltage to the longitudinal voltage is [Math Processing Error]. The disorder effect is also considered in the study of the Rashba-Dresselhaus system. We find that the transverse force vanishes in the presence of impurities in this system because the vertex correction and the anomalous velocity of the electron accidently cancel each other.
關聯:	Phys. Rev. B, Vol.80, pp.165302
資料類型:	期刊論文
DOI 連結:	https://doi.org/10.1103/PhysRevB.80.165302
DOI:	10.1103/PhysRevB.80.165302
顯示於類別:	[應用物理研究所 ] 期刊論文

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