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

## TL;DR

This paper studies how Rashba spin-orbit coupling influences persistent charge and spin currents in a mesoscopic ring with an Anderson impurity, revealing suppression of the Kondo effect and oscillatory behavior of currents.

## Contribution

It introduces a detailed analysis of spin-orbit effects on persistent currents in mesoscopic rings with Anderson impurities using the finite U slave boson method.

## Key findings

- Kondo effect reduces persistent current magnitude
- Spin-orbit coupling causes oscillations in currents
- Persistent spin current can exist without charge current

## Abstract

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.