Superconductivity as a Bose-Einstein condensation?
超导电性
2016-08-15 v1 软凝聚态物质
摘要
Bose-Einstein condensation (BEC) in two dimensions (2D) (e.g., to describe the quasi-2D cuprates) is suggested as the possible mechanism widely believed to underlie superconductivity in general. A crucial role is played by nonzero center-of-mass momentum Cooper pairs (CPs) usually neglected in BCS theory. Also vital is the unique {\it linear} dispersion relation appropriate to weakly-coupled "bosonic" CPs moving in the Fermi sea--rather than in vacuum where the dispersion would be quadratic but only for very strong coupling, and for which BEC is known to be impossible in 2D.
引用
@article{arxiv.cond-mat/0004223,
title = {Superconductivity as a Bose-Einstein condensation?},
author = {S. K. Adhikari and M. Casas and A. Puente and A. Rigo and M. Fortes and M. A. Solís and M. de Llano and A. A. Valladares and O. Rojo},
journal= {arXiv preprint arXiv:cond-mat/0004223},
year = {2016}
}
备注
6 pages included 3 figures