On the influence of thermal fluctuations on the current-phase relation in superconducting point contacts

被引：8

作者：

Ouboter, RD ^{[1
]}

Omelyanchouk, AN ^{[1
]}

机构：

[1] NATL ACAD SCI UKRAINE,B VERKIN INST LOW TEMP PHYS & ENGN,KHARKOV 310164,UKRAINE

来源：

PHYSICA B | 1995年 / 216卷 / 1-2期

关键词：

D O I：

10.1016/0921-4526(95)00437-8

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of thermal fluctuations on the current-phase relation (CPR) in superconducting weak links is studied. We consider the case of a superconducting ring with sufficiently small inductance, interrupted by a ballistic point contact or a tunnel junction. The fluctuation effected CPR is calculated and compared with the CPR without fluctuations. The effect of the fluctuations are observable in the measured CPR by a reduction of the maximum value of the current, as well as in the shape of the CPR curve. It is shown that the value of the phase corresponding to the maximum in the current is shifted to smaller values in accordance with recent experimental data.

引用

页码：37 / 42

页数：6

共 14 条

[1]

AMBEGAOKAR V, 1963, PHYS REV LETT, V11, P104, DOI 10.1103/PhysRevLett.11.104

[2]

AMBEGAOKAR V, 1963, PHYS REV LETT, V10, P468

[3] THE DETERMINATION OF THE SUPERCURRENT-PHASE RELATION OF SUPERCONDUCTING WEAK LINKS IN STATIC CONDITION [J].

DEWOLFF, E ;

ROOBEEK, HC ;

KOOPS, MC ;

OUBOTER, RD .

PHYSICA B, 1992, 179 (04) :295-308

[4] DC JOSEPHSON EFFECT AND ANDREEV REFLECTION [J].

FURUSAKI, A ;

TSUKADA, M .

SOLID STATE COMMUNICATIONS, 1991, 78 (04) :299-302

[5] DIRECT MEASUREMENT OF CURRENT-PHASE RELATIONS IN SUPERCONDUCTING WEAK LINKS [J].

JACKEL, LD ;

BUHRMAN, RA ;

WEBB, WW .

PHYSICAL REVIEW B, 1974, 10 (07) :2782-2785

[6]

Khlus V.A., 1986, SOV J LOW TEMP PHYS, V12, P14

[7]

KOOPS MC, 1995, IN PRESS PHYSICA B

[8]

KOOPS MC, 1995, JUN P POINT CONT SPE

[9]

Kulik I. O., 1977, SOV J LOW TEMP PHYS, V3, P459

[10]

Landau L D., 1959, STAT PHYS

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