Local time-reversal-symmetry breaking in dx2-y2 superconductors

被引：19

作者：

Graf, MJ ^{[1
]}

Balatsky, AV

Sauls, JA

机构：

[1] Univ Calif Los Alamos Natl Lab, Ctr Mat Sci, Los Alamos, NM 87545 USA

[2] Univ Calif Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA

[3] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.61.3255

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We show that an isolated impurity in a spin singlet d(x2)-(y2) superconductor generates a d(xy) order parameter with locally broken time-reversal symmetry. The origin of this effect is a coupling between the d(X2)-(y2) and the d(xy) order parameter induced by spin-orbit scattering off the impurity. The signature of locally broken time-reversal symmetry is an induced orbital charge current near the impurity, which generates a localized magnetic field in the vicinity of the impurity. We present a microscopic theory for the impurity-induced d(xy) component, discuss its spatial structure as well as the pattern of induced current and local magnetic field near the localized impurity spin.

引用

页码：3255 / 3258

页数：4