THEORY OF THE MARGINAL-FERMI-LIQUID SPECTRUM AND PAIRING IN A LOCAL COPPER-OXIDE MODEL

被引：37

作者：

SIRE, C

VARMA, CM

RUCKENSTEIN, AE

GIAMARCHI, T

机构：

[1] UNIV TOULOUSE 3,PHYS QUANT LAB,F-31062 TOULOUSE,FRANCE

[2] RUTGERS STATE UNIV,DEPT PHYS,PISCATAWAY,NJ 08854

[3] UNIV PARIS 11,PHYS SOLIDES LAB,F-91405 ORSAY,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.72.2478

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We solve for the properties of an impurity model abstracted from a model of copper oxide superconductors. At mixed valence, provided that Friedel's screening condition is satisfied, the marginal-Fermi-liquid spectrum is obtained for the spin and charge susceptibilities. The frequency dependence of the self-energies is SIGMA(omega) is similar to omegalnomega + iomega. This critical point is surrounded by two different Fermi-liquid phases. A simplified two-impurity version of this model is also addressed, and presents similar features, including a logarithmic divergence for coherent pair susceptibility.

引用

页码：2478 / 2481

页数：4

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