Lifshitz tail in the density of states of a superconductor with magnetic impurities

被引：37
|
作者：
Balatsky, AV
Trugman, SA
机构：
[1] LD LANDAU THEORET PHYS INST,MOSCOW,RUSSIA
[2] LOS ALAMOS NATL LAB,DIV THEORET,LOS ALAMOS,NM 87545
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 19期
关键词：
D O I：
10.1103/PhysRevLett.79.3767
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We argue that any superconductor with magnetic impurities is gapless due to a Lifshitz tail in the density of states extending to zero energy. At low energy the density of states nu(E --> 0) remains finite. We show that fluctuations in the impurity distribution produce regions of suppressed superconductivity, which are responsible for the low energy density of states. [S0031-9007(97)04452-9].
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页码：3767 / 3770
页数：4
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