GAP RENORMALIZATION IN DIRTY ANISOTROPIC SUPERCONDUCTORS - IMPLICATIONS FOR THE ORDER-PARAMETER OF THE CUPRATES

被引：130

作者：

FEHRENBACHER, R

NORMAN, MR

机构：

[1] Science and Technology Center for Superconductivity, Materials Science Division, Argonne National Laboratory, Argonne

来源：

PHYSICAL REVIEW B | 1994年 / 50卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.50.3495

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We contrast the effects of nonmagnetic impurities on the properties of superconductors having a d(x2-y2) order parameter, and a highly anisotropic s-wave (ASW) gap with the same nodal structure. The nonvanishing, impurity-induced, off-diagonal self-energy in the ASW state is shown to inhibit the low-energy excitations present in the clean system, leading to a qualitatively different impurity response of the single-particle density of states compared to the d(x2-y2) state. We discuss how this behavior can be employed to distinguish one state from the other by an analysis of high-resolution angle-resolved photoemission spectra.

引用

页码：3495 / 3498

页数：4

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