Suppression of persistent currents in one-dimensional disordered rings by the Coulomb interaction
- 15 August 1994
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 50 (7) , 4943-4946
- https://doi.org/10.1103/physrevb.50.4943
Abstract
The effects of the Coulomb interaction on persistent currents in disordered one-dimensional rings are investigated numerically. First, the effectiveness of the Hartree-Fock approximation is established on small systems. Then the calculations are performed for systems with 40 electrons in 100 sites. It is found that the amplitude of the average persistent current in the diffusive regime is suppressed as the strength of the Coulomb interaction increases. The suppression of the current is stronger in larger rings than in smaller ones. The enhancement of the current by the electron-electron interaction was not observed in the diffusive regime.Keywords
All Related Versions
This publication has 21 references indexed in Scilit:
- Experimental observation of persistent currents in GaAs-AlGaAs single loopPhysical Review Letters, 1993
- Persistent Currents of Single Mesoscopic RingsEurophysics Letters, 1992
- Magnetic response of a single, isolated gold loopPhysical Review Letters, 1991
- Persistent differences between canonical and grand canonical averages in mesoscopic ensembles: Large paramagnetic orbital susceptibilitiesPhysical Review Letters, 1991
- Average persistent current in a mesoscopic ringPhysical Review Letters, 1991
- Persistent currents in mesoscopic rings by suppression of charge fluctuationsPhysical Review Letters, 1991
- Persistent currents in mesoscopic metallic rings: Ensemble averagePhysical Review B, 1990
- Coherence and persistent currents in mesoscopic ringsPhysical Review Letters, 1990
- Magnetization of mesoscopic copper rings: Evidence for persistent currentsPhysical Review Letters, 1990
- Josephson behavior in small normal one-dimensional ringsPhysics Letters A, 1983