A model for the doped copper oxide compounds

被引:1
作者
Alonso, JL [1 ]
Boucaud, P
Martin-Mayor, V
van der Sijs, AJ
机构
[1] Univ Zaragoza, Dept Fis Teor, E-50009 Zaragoza, Spain
[2] Univ Paris 11, LPTHE, F-91405 Orsay, France
[3] Univ Complutense Madrid, Dept Fis Teor 1, E-28040 Madrid, Spain
[4] ETH Zentrum, Swiss Ctr Sci Comp, CH-8092 Zurich, Switzerland
来源
EUROPHYSICS LETTERS | 1998年 / 42卷 / 05期
关键词
D O I
10.1209/epl/i1998-00285-3
中图分类号
O4 [物理学];
学科分类号
0702 ;
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
收藏
页码:541 / 546
页数:6
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