A model for the doped copper oxide compounds
超导电性
2009-10-30 v2 强关联电子
高能物理 - 格点
摘要
We present a relativistic spin-fermion model for the cuprates, in which both the charge and spin degrees of freedom are treated dynamically. The spin-charge coupling parameter is associated with the doping fraction. The model is able to account for the various phases of the cuprates and their properties, not only at low and intermediate doping but also for (highly) over-doped compounds. In particular, we acquire a qualitative understanding of high-T_c superconductivity through Bose-Einstein condensation of bound charge pairs. The mechanism that binds these pairs does not require a Fermi sea.
引用
@article{arxiv.cond-mat/9706022,
title = {A model for the doped copper oxide compounds},
author = {J. L. Alonso and Ph. Boucaud and V. Martin-Mayor and A. J. van der Sijs},
journal= {arXiv preprint arXiv:cond-mat/9706022},
year = {2009}
}
备注
9 pages, 2 postscript figures. Version accepted for publication in Europhys. Lett