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.
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页码：3495 / 3498
页数：4
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