The weak localization correction to the polarization and persistent currents in mesoscopic metal rings
Mesoscale and Nanoscale Physics
2009-10-30 v3
Abstract
We re-examine the effect of electron-electron interactions on the persistent current in mesoscopic metal rings threaded by an Aharonov-Bohm flux. The exchange contribution to the current is shown to be determined by the weak localization correction to the polarization. We explicitly calculate the contribution from exchange interactions with momentum transfers smaller than the inverse elastic mean free path to the average current, and find that it has the same order of magnitude as the {\it{canonical}} current without interactions. \\
Keywords
Cite
@article{arxiv.cond-mat/9706237,
title = {The weak localization correction to the polarization and persistent currents in mesoscopic metal rings},
author = {Peter Kopietz and Axel Voelker},
journal= {arXiv preprint arXiv:cond-mat/9706237},
year = {2009}
}
Comments
additional vertex correction taken into account: weak localization correction to the diffusion coefficient in the denominator changes final result