Persistent currents with long-range hopping in 1D single-isolated-diffusive rings
介观与纳米尺度物理
2007-05-23 v3 强关联电子
摘要
We show from exact calculations that a simple tight-binding Hamiltonian with diagonal disorder and long-range hopping integrals, falling off as a power of the inter-site separation, correctly describes the experimentally observed amplitude (close to the value of an ordered ring) and flux-periodicity () of persistent currents in single-isolated-diffusive normal metal rings of mesoscopic size. Long-range hopping integrals tend to delocalize the electrons even in the presence of disorder resulting orders of magnitude enhancement of persistent current relative to earliar predictions.
引用
@article{arxiv.cond-mat/0409189,
title = {Persistent currents with long-range hopping in 1D single-isolated-diffusive rings},
author = {Santanu K. Maiti and J. Chowdhury and S. N. Karmakar},
journal= {arXiv preprint arXiv:cond-mat/0409189},
year = {2007}
}
备注
4 pages, 3 figures