Inhomogeneous state in nonequilibrium superconductor/normal-metal tunnel structures: A Larkin-Ovchinnikov-Fulde-Ferrell-like phase for nonmagnetic systems

被引：16

作者：

Moor, A. ^{[1
]}

Volkov, A. F. ^{[1
,2
]}

Efetov, K. B. ^{[1
]}

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

[2] Russian Acad Sci, Inst Radioengn & Elect, Moscow 125009, Russia

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 05期

关键词：

differential equations; exchange interactions (electron); superconductive tunnelling; superconductor-normal-superconductor devices; ANDREEV INTERFEROMETERS; SUPERCONDUCTIVITY; JUNCTIONS; MICROBRIDGES; SUPERCURRENT; RELAXATION; CONDUCTORS; INJECTION; PARTICLE; FIELD;

D O I：

10.1103/PhysRevB.80.054516

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze nonequilibrium states in a tunnel superconductor-normal-metal (N/S/N) structure in the presence of a tunnel current I. We use an approximation of an effective temperature T and calculate the current-voltage I-V characteristics. It is shown that the I-V dependence may have an S-shaped form. We determine nonuniform current I(x) and temperature T(x) distributions that arise as a result of instability of the uniform state with negative differential conductance (dI/dV < 0). We discuss an analogy with equilibrium superconductors with an exchange field in which nonuniform states predicted by Larkin/Ovchinnikov and Fulde/Ferrell are possible.

引用

页数：7

共 54 条

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ALTSHULER BL, 1978, SOV PHYS JETP, V48, P670

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