Theory of Josephson effect in strongly correlated electron systems

被引：0

作者：

Yokoyama, Takehito ^{[1
]}

Onari, Seiichiro ^{[2
]}

Tanaka, Yukio ^{[2
]}

机构：

[1] Univ Tokyo, Dept Appl Phys, Tokyo 1138656, Japan

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

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷

关键词：

Josephson effect; Fluctuation exchange approximation; Repulsive Hubbard model; 2-DIMENSIONAL HUBBARD-MODEL; CONSERVING APPROXIMATIONS; SPIN FLUCTUATION; SUPERCONDUCTIVITY; JUNCTIONS;

D O I：

10.1016/j.physc.2009.11.100

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study Josephson effect in superconducting junction based on the repulsive Hubbard model on the square lattice with the fluctuation exchange approximation and the recursive Green's function method. It is shown that the proximity effect is suppressed by the repulsive interaction in the normal metal, and consequently Josephson current in superconductor/normal metal/superconductor junction is reduced due to the strong correlation effect. This is because the imaginary part of the self energy, which facilitates the damping effect, grows with the repulsive interaction. (C) 2009 Elsevier B.V. All rights reserved.

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页码：S884 / S885

页数：2

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