Spin-orbit coupling effect on the persistent currents in mesoscopic ring with an Anderson impurity

Details Spin-orbit coupling effect on the persistent currents in mesoscopic ring with an Anderson impurity Spin-orbit coupling effect on the persistent currents in mesoscopic ring with an Anderson impurity

2007-04-03

arxiv.org/abs/0704.0319v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.76.125301

Based on the finite $U$ slave boson method, we have investigated the effect of Rashba spin-orbit(SO) coupling on the persistent charge and spin currents in mesoscopic ring with an Anderson impurity. It is shown that the Kondo effect will decrease the magnitude of the persistent charge and spin currents in this side-coupled Anderson impurity case. In the presence of SO coupling, the persistent currents change drastically and oscillate with the strength of SO coupling. The SO coupling will suppress the Kondo effect and restore the abrupt jumps of the persistent currents. It is also found that a persistent spin current circulating the ring can exist even without the charge current in this system.

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