Evolution of the density of states gap in a disordered superconductor

被引：32

作者：

Huscroft, C ^{[1
]}

Scalettar, RT ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.81.2775

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determine the effect of a random potential on the density of states N(omega) in the attractive Hubbard model. At weak coupling, disorder closes the gap concurrently with the destruction of superconductivity. At larger, but still intermediate coupling, a pseudogap in N(omega) remains beyond the point at which off-diagonal long range order vanishes. This change in the elementary excitations of the insulating phase corresponds to a crossover between Fermi and Bose insulators. [S0031-9007(98)07201-9].

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页码：2775 / 2778

页数：4

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