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

页码：13724 / 13727

页数：4