New insight into enhanced superconductivity in metals near the metal-insulator transition

被引：47

作者：

Osofsky, MS ^{[1
]}

Soulen, RJ ^{[1
]}

Claassen, JH ^{[1
]}

Trotter, G ^{[1
]}

Kim, H ^{[1
]}

Horwitz, JS ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.87.197004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the transport properties of disordered WSi films near the metal/insulator transition (MIT) and we have also reviewed the data for several other disordered materials near their MIT. In all cases, we found the presence of enhanced superconductivity. We constructed a superconductivity "phase diagram" (i.e., T-c versus sigma) for each system, which reveals a striking correlation: In all cases, T-c values are significantly enhanced only for samples whose conductivities lie within a narrow range on the metallic side of, and moderately near, the MIT. We present a heuristic model to explain this phenomenon.

引用

页码：197004/1 / 197004/4

页数：4

共 35 条

[1] SUPERCONDUCTIVITY IN FILMS OF BETA TUNGSTEN AND OTHER TRANSITION METALS [J].