Persistent Currents in Small, Imperfect Hubbard Rings
介观与纳米尺度物理
2009-11-10 v1 强关联电子
摘要
We have done a study with small, imperfect Hubbard rings with exact diagonalization. The results for few-electron rings show, that the imperfection, whether localized or not, nearly always decrease, but can also \emph{increase} the persistent current, depending on the character of the imperfection and the on-site interaction. The calculations are generally in agreement with more specialized studies. In most cases the electron spin plays an important role.
引用
@article{arxiv.cond-mat/0310055,
title = {Persistent Currents in Small, Imperfect Hubbard Rings},
author = {P. Koskinen and M. Manninen},
journal= {arXiv preprint arXiv:cond-mat/0310055},
year = {2009}
}
备注
6 pages, 4 figures