Cooper pair delocalization in disordered media
超导电性
2009-10-30 v1 强关联电子
摘要
We discuss the effect of disorder on the coherent propagation of the bound state of two attracting particles. It is shown that a result analogous to the Anderson theorem for dirty superconductors is also valid for the Cooper problem, namely, that the pair wave function is extended beyond the single-particle localization length if the latter is large. A physical justification is given in terms of the Thouless block-scaling picture of localization. These arguments are supplemented by numerical simulations. With increasing disorder we find a transition from a regime in which the interaction delocalizes the pair to a regime in which the interaction enhances localization.
引用
@article{arxiv.cond-mat/9708021,
title = {Cooper pair delocalization in disordered media},
author = {M. A. N. Araujo and M. Dzierzawa and C. Aebischer and D. Baeriswyl},
journal= {arXiv preprint arXiv:cond-mat/9708021},
year = {2009}
}
备注
5 pages, RevTex with 2 figures included