Shape of Cooper pairs in a normal-metal/superconductor junction

被引：8

作者：

Tanaka, Yukio ^{[1
,2
]}

Asano, Yasuhiro ^{[3
]}

Golubov, Alexander A. ^{[4
,5
]}

机构：

[1] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 4648603, Japan

[2] Japan Sci & Technol Cooperat, CREST, Nagoya, Aichi 4648603, Japan

[3] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido 0608628, Japan

[4] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[5] Univ Twente, Mesa Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.77.220504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In s-wave superconductors the Cooper pair wave function is isotropic in momentum space. This property may also be expected for Cooper pairs entering a normal metal from a superconductor due to the proximity effect. We show, however, that such a deduction is incorrect and the pairing function in a normal metal is surprisingly anisotropic because of quasiparticle interference. We calculate angle-resolved quasiparticle density of states in NS bilayers which reflects such anisotropic shape of the pairing function. We also propose a magnetotunneling spectroscopy experiment which could confirm our predictions.

引用

页数：4

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