CHARGE FLUCTUATIONS, CHARGE-TRANSFER INSTABILITIES, AND SUPERCONDUCTIVITY IN A 3-BAND MODEL OF CUO2 PLANES

被引：12

作者：

HICKS, JC

RUCKENSTEIN, AE

SCHMITTRINK, S

机构：

[1] RUTGERS STATE UNIV,SERIN PHYS LAB,PISCATAWAY,NJ 08855

[2] UNIV MARBURG,DEPT PHYS,W-3550 MARBURG,GERMANY

[3] UNIV MARBURG,CTR MAT SCI,W-3550 MARBURG,GERMANY

来源：

PHYSICAL REVIEW B | 1992年 / 45卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.45.8185

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We apply a recently developed quasiparticle theory for strongly correlated systems to a three-band model of Cu-O planes. We allow for Cu-O hybridization, Cu-O intersite repulsion, and a large on-site repulsion at the Cu sites (which will be treated as infinite). We use the large spin degeneracy (1/N) expansion to study (i) the interplay between charge-transfer instabilities and phase separation in the mean-field (N = infinity limit) phase diagram of this model and (ii) the pairing interactions induced by the charge fluctuations (calculated to leading order in 1/N) in the proximity of these instabilities.

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页码：8185 / 8188

页数：4

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