Persistent current induced by magnetic impurities

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 $I\sim E_c^2/(kT{\varphi }_0)$, which is considerably larger than the persistent current induced by the electron-electron interaction.

19 pages, 7 figures, accepted by Z. Phys. B

References in corpus (4)

• Does the attractive Hubbard model support larger persistent currents than the repulsive one ?
• Suppression of Persistent Currents in 1-D Disordered Rings by Coulomb Interaction
• Phase Coherence in a Random One-Dimensional System of Interacting Fermions: A Density Matrix Renormalization Group Study
• Electron-electron interactions in one- and three-dimensional mesoscopic disordered rings: a perturbative approach

Cited by in corpus (5)

• Imperfect nanorings with superconducting correlations
• High sensitivity cantilevers for measuring persistent currents in normal metal rings
• Optimal scaling of persistent currents for interacting bosons on a ring
• Searching for thermal signatures of persistent currents in normal metal rings
• Persistent Currents in Normal Metal Rings (Yale PhD thesis)