SUPERCONDUCTING PROXIMITY EFFECT IN AN AU OF AU-CLAD NB WIRE IN THE CLEAN LIMIT

被引：9

作者：

ONOE, H ^{[1
]}

SUMIYAMA, A ^{[1
]}

NAKAGAWA, M ^{[1
]}

ODA, Y ^{[1
]}

机构：

[1] HIMEJI INST TECHNOL, FAC SCI, HARIMA, HYOGO 67812, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 06期

关键词：

PROXIMITY EFFECT; MEISSNER EFFECT; AU-CLAD NB WIRE; CLEAN LIMIT; DILUTION REFRIGERATOR; HARTSHORN BRIDGE; MEAN FREE PATH; COHERENCE LENGTH; JOSEPHSON CRITICAL CURRENT; SNS JUNCTION;

D O I：

10.1143/JPSJ.64.2138

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thickness of the Meissner region rho in Au of Au-clad Nb wire has been measured down to 50 mK, in order to investigate the superconductivity in a normal metal induced by the proximity effect. The magnetic field dependence of rho and the Josephson critical current I-C through a SNS junction made of an Au-clad Nb wire have been also measured to estimate the coherence length xi(N) in Au. Above 150 mK, rho and xi(N) increase in proportion to T-1, and are independent of the mean free path l(N) in Au. Although Au is in the clean limit (l(N) > xi(N)), these results can be qualitatively interpreted by the dirty limit theory with a modification using xi(N) derived in the clean limit.

引用

页码：2138 / 2143

页数：6

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