中国物理B ›› 2009, Vol. 18 ›› Issue (1): 282-286.doi: 10.1088/1674-1056/18/1/045

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Macroscopic spin and charge transport theory

李大芳, 施均仁   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2008-06-23 修回日期:2008-07-03 出版日期:2009-01-20 发布日期:2009-01-20
  • 基金资助:
    Project supported by the National Key Basic Research Special Foundation of China (Grant No 2006CB921300), and the National Natural Science Foundation of China (Grant No 10604063).

Macroscopic spin and charge transport theory

Li Da-Fang(李大芳) and Shi Jun-Ren(施均仁)†   

  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2008-06-23 Revised:2008-07-03 Online:2009-01-20 Published:2009-01-20
  • Supported by:
    Project supported by the National Key Basic Research Special Foundation of China (Grant No 2006CB921300), and the National Natural Science Foundation of China (Grant No 10604063).

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摘要： According to the general principle of non-equilibrium thermodynamics, we propose a set of macroscopic transport equations for the spin transport and the charge transport. In particular, the spin torque is introduced as a generalized `current density' to describe the phenomena associated with the spin non-conservation in a unified framework. The Einstein relations and the Onsager relations between different transport phenomena are established. Specifically, the spin transport properties of the isotropic non-magnetic and the isotropic magnetic two-dimensional electron gases are fully described by using this theory, in which only the macroscopic-spin-related transport phenomena allowed by the symmetry of the system are taken into account.

Abstract: According to the general principle of non-equilibrium thermodynamics, we propose a set of macroscopic transport equations for the spin transport and the charge transport. In particular, the spin torque is introduced as a generalized `current density' to describe the phenomena associated with the spin non-conservation in a unified framework. The Einstein relations and the Onsager relations between different transport phenomena are established. Specifically, the spin transport properties of the isotropic non-magnetic and the isotropic magnetic two-dimensional electron gases are fully described by using this theory, in which only the macroscopic-spin-related transport phenomena allowed by the symmetry of the system are taken into account.

Key words: spin torque, spin Hall effect, Einstein relation, Onsager relation

中图分类号:  (Spin polarized transport)

  • 72.25.-b
72.10.-d (Theory of electronic transport; scattering mechanisms) 73.63.-b (Electronic transport in nanoscale materials and structures)