Π a la node:: Disordered d-wave superconductors in two dimensions for the random masses

被引:35
作者
Hirschfeld, PJ [1 ]
Atkinson, WA
机构
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
[2] Univ Augsburg, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany
[3] So Illinois Univ, Dept Phys, Carbondale, IL 62901 USA
关键词
D O I
10.1023/A:1013838523587
中图分类号
O59 [应用物理学];
学科分类号
摘要
We review work on the problem of disorder in the 2D d-wave superconducting state, and show that the symmetries of the normal state and the disorder distribution are vital for understanding the low-energy behavior. Most previous theoretical results for the density of states (DOS) are reconciled by a combination of exact numerical solutions of the Bogoliubov-de Gennes equations and weak localization calculations, which suggest that a novel diffusive mode with momentum (pi,pi) is responsible for a divergence of the DOS in the globally particle-hole symmetric case. We note briefly that the simple problem of a disordered tight-binding band of normal electrons displays some similar effects, which have been overlooked in the literature. Finally, in the physically realistic case of binary alloy disorder, no particle-hole symmetry, and an order parameter which is supressed around each impurity site, a power law with nonuniversal exponent is predicted.
引用
收藏
页码:881 / 900
页数:20
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