Coulomb correlations and pseudogap effects in a preformed pair model for the cuprates

被引：20

作者：

Maly, J

Levin, K

Liu, DZ

机构：

[1] James Franck Institute, University of Chicago, Chicago

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.54.R15657

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We extend previous work on preformed pair models of superconductivity to incorporate Coulomb correlation effects. For neutral systems, these models have provided a useful scheme which interpolates between BCS and Bose-Einstein condensation with increasing coupling and thereby describes some aspects of pseudogap phenomena. However, charge fluctuations (via the plasmon, omega(p)) significantly modify the collective modes and therefore the interpolation behavior. We discuss the resulting behavior of the pseudogap and thermodynamic quantities such as T-c, chi, and C(u)psilon as a function of omega(p).

引用

页码：15657 / 15660

页数：4

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