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Persistent spin current in a spin-orbit coupling/normal hybrid ring

Qing-feng Sun·X. C. Xie·Jian Wang
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Abstract

We investigate the equilibrium property of a mesoscopic ring with spin orbit (SO) interaction. It is well known that for a normal mesoscopic ring threaded by a magnetic flux, the electron acquires a Berry phase that induces the persistent (charge) current. Similarly, the spin of electron acquires a spin Berry phase traversing the ring with SO interaction. It is this spin Berry phase that induces a persistent spin current. To demonstrate its existence, we calculate the persistent spin current without accompanying charge current in the normal region in a hybrid mesoscopic ring. We point out that this persistent spin current describes the real spin motion and can be observed experimentally.

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Qing-feng Sun, X. C. Xie, Jian Wang. 2006-05-31. Persistent spin current in a spin-orbit coupling/normal hybrid ring. https://doi.org/10.1103/physrevlett.98.196801

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