Conductance fluctuations in mesoscopic granular superconductors

被引：5

作者：

Frydman, A ^{[1
]}

Price, EP ^{[1
]}

Dynes, RC ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 106卷 / 11期

关键词：

D O I：

10.1016/S0038-1098(98)00127-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report on a transport study of granular superconductivity films with lengths as small as 1000 Angstrom and typical grain sizes of 100 Angstrom. The I-V characteristics of these samples are hysteretic and exhibit sharp, discontinuous voltage jumps. We attribute these features to destruction of superconducting phase locking between individual grains. In addition, we observe a rich profile of conductance fluctuations which, unlike the previous features, are non-hysteretic. The amplitude of the fluctuations scales with the conductance and may reach values much larger than e(2)/h. We suggest that these features stem from interference of the superconductive wave-function, which is modulated by self induced flux penetrating the random granular network. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：715 / 719

页数：5

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