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Persistent current induced by magnetic impurities

P. Schwab·U. Eckern
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Abstract

We calculate the average persistent current in a normal conducting, mesoscopic ring in the diffusive regime. In the presence of magnetic impurities, a contribution to the persistent current is identified, which is related to fluctuations in the electron spin density. Assuming a spin-flip scattering rate which is comparable to the Thouless energy E_c and low temperature, this new contribution to the persistent current is of the order $I\sim E_c^2/(kTϕ_0)$, which is considerably larger than the persistent current induced by the electron-electron interaction.

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P. Schwab, U. Eckern. 1997-02-05. Persistent current induced by magnetic impurities. https://doi.org/10.1007/s002570050341

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