Enhancement of Persistent Currents by the Coulomb Interaction
Condensed Matter
2007-05-23 v1
Abstract
The persistent current in three-dimensional mesoscopic rings is investigated numerically. The model is tight-binding one with random site-energies and interaction between electrons. The Hartree-Fock approximation is adopted for the interaction between electrons, and models with up to sites are investigated. It is shown that the long-range Coulomb interaction enhances the persistent current considerably for rings with finite width. It is also shown that long-rangedness of the interaction is essential for the enhancement. Screening of the random site-energy is attributed to this enhancement.
Keywords
Cite
@article{arxiv.cond-mat/9409038,
title = {Enhancement of Persistent Currents by the Coulomb Interaction},
author = {D. Yoshioka and H. Kato},
journal= {arXiv preprint arXiv:cond-mat/9409038},
year = {2007}
}
Comments
10 pages (RevTex), 3 figures available upon request will be sent by air mail. KCMG-preprint-YK2