Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2005-12-15
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, RevTeX4
Scientific paper
10.1103/PhysRevB.74.125313
Applying the Gordon-decomposition-like technique, the convective spin current (CSC) is extracted from the total angular-momentum current. The CSC describes the transport properties of the electron spin and is conserved in the relativistic quantum mechanics approach where the spin-orbit coupling has been intrinsically taken into account. Arrestingly, in the presence of external electromagnetic field, the component of the convective spin along the field remain still conserved. This conserved CSC is also derived for the first time in the nonrelativistic limit using the Foldy-Wouthuysen transformation.
Chen Yan
Shen Rongfeng
Wang Zheng-Dong
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