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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 | | Abstract: | The 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 | | Services: | Forum | Review | PDF | Favorites | |
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