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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 15-Aug-2019 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 https://doi.org/10.1103/PhysRevB.80.165302
dc.contributor 應物所
dc.creator (作者) Chen, Tsung-Wei
dc.creator (作者) 許琇娟
dc.creator (作者) Hsu, Hsiu-Chuan
dc.creator (作者) Guo, Guang-Yu
dc.date (日期) 2009-09
dc.date.accessioned 15-Aug-2019 10:56:33 (UTC+8)-
dc.date.available 15-Aug-2019 10:56:33 (UTC+8)-
dc.date.issued (上傳時間) 15-Aug-2019 10:56:33 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/125220-
dc.description.abstract (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.
dc.format.extent 542102 bytes-
dc.format.mimetype application/pdf-
dc.relation (關聯) Phys. Rev. B, Vol.80, pp.165302
dc.title (題名) Transverse force generated by an electric field and transverse charge imbalance in spin-orbit coupled systems
dc.type (資料類型) 期刊論文
dc.identifier.doi (DOI) 10.1103/PhysRevB.80.165302
dc.doi.uri (DOI) https://doi.org/10.1103/PhysRevB.80.165302