ON SUPERCONDUCTING PAIRING IN THE 2-BAND HUBBARD-MODEL

被引：2
|
作者：
LOVTSOV, SV [1 ]
PLAKIDA, NM [1 ]
YUSHANKHAI, VY [1 ]
机构：
[1] JOINT INST NUCL RES,DUBNA 141980,RUSSIA
来源：
PHYSICA B | 1990年 / 165卷
关键词：
D O I：
10.1016/S0921-4526(09)80089-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A two-band Hubbard model for highly hybridized copper 3d(x2-y2) and oxygen 2p(x,y) electrons in CuO2 plane with strong Coulomb repulsion at copper sites is considered. A real-space pairing mechanism induced by antiferromagnetic interaction of Kondo type is treated. To avoid the Gutzwiller approximation the projection technique for two-time Green functions for Hubbard operators is employed. It is shown that due to rigorous restriction of no double occupancy at copper sites the exchange-mediated p-d pairing is absent. © 1990, Elsevier Science Publishers B.V. (North-Holland). All rights reserved.
引用
收藏
页码：1007 / 1008
页数：2
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