PHASE-SEPARATION, CHARGE-TRANSFER INSTABILITY, AND SUPERCONDUCTIVITY IN THE 3-BAND EXTENDED HUBBARD-MODEL - WEAK-COUPLING THEORY

被引：31
|
作者：
BANG, YY [1 ]
KOTLIAR, G [1 ]
CASTELLANI, C [1 ]
GRILLI, M [1 ]
RAIMONDI, R [1 ]
机构：
[1] UNIV ROME LA SAPIENZA,DIPARTMENTO FIS,I-00185 ROME,ITALY
来源：
PHYSICAL REVIEW B | 1991年 / 43卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.43.13724
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the interplay of charge-transfer instability and phase separation in the three-band model using the Hartree-Fock variational method for values of the interaction couplings comparable to the bandwidth. We establish that phase separation occurs near the region where previous weak-coupling calculations found s-wave superconductivity and a charge-transfer instability.
引用
收藏
页码：13724 / 13727
页数：4
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