Temperature dependence of the superconducting order parameter in the flex-approximation for the Hubbard model

被引：17

作者：

Dahm, T

机构：

[1] Department of Physics, University of California, Santa Barbara

来源：

SOLID STATE COMMUNICATIONS | 1997年 / 101卷 / 07期

关键词：

high-T-c superconductors;

D O I：

10.1016/S0038-1098(96)00650-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Calculations within the self-consistent and conserving fluctuation-exchange approximation (FLEX) on the two-dimensional one-band Hubbard model with a bandstructure appropriate for YBa2Cu3O7-x are presented in the superconducting state. The d-wave order parameter opens much more rapidly below T-c than BCS behavior. The temperature dependence near T-c is studied in more detail and an explanation is provided. I show the resulting anisotropic quasiparticle damping rates and discuss also how well the FLEX-approximation can describe the high-T-c superconductors. (C) 1997 Elsevier Science Ltd

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收藏

页码：487 / 492

页数：6

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