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03 October 2022
 
  » arxiv » cond-mat/0507159

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Conservation of spin current
Jian Wang ; Baigeng Wang ; Wei Ren ; Hong Guo ;
Date 7 Jul 2005
Subject Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall
AbstractThe conventional definition of spin-current, namely spin density multiplied by the group velocity, is not a conserved quantity due to possible spin rotations caused by spin-orbit (SO) interaction. In this paper we prove that the non-conservation problem of spin-current can be resolved if a self-consistent spin-spin interaction is included in the analysis. We further derive a spin-conductance formula which partitions spin-current into different leads of a multi-lead conductor.
Source arXiv, cond-mat/0507159
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