Current-induced spin polarization in spin-orbit-coupled electron systems

Ming Hao Liu, Son Hsien Chen, Ching Ray Chang

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

Current-induced spin polarization (CISP) is rederived in ballistic spin-orbit-coupled electron systems, based on equilibrium statistical mechanics. A simple and useful picture is correspondingly proposed to help understand the CISP and predict the polarization direction. Nonequilibrium Landauer-Keldysh formalism is applied to demonstrate the validity of the statistical picture, taking the linear Rashba-Dresselhaus [001] two-dimensional system as a specific example. Spin densities induced by the CISP in semiconductor heterostructures and in metallic surface states are compared, showing that the CISP increases with the spin-splitting strength, and hence suggesting that the CISP should be more observable on metal and semimetal surfaces due to the discovered strong Rashba splitting. An application of the CISP designed to generate a spin-Hall pattern in the in-plane, instead of the out-of-plane, component is also proposed.

原文English
文章編號165316
期刊Physical Review B - Condensed Matter and Materials Physics
78
發行號16
DOIs
出版狀態Published - 2008 10月 20

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 凝聚態物理學

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