Quantum periodicity in the critical current of superconducting rings with asymmetric link-up of current leads

被引：5

作者：

Burlakov, A. A. ^{[1
]}

Chernykh, A. V. ^{[1
]}

Gurtovoi, V. L. ^{[1
,2
]}

Ilin, A. I. ^{[1
]}

Mikhailov, G. M. ^{[1
]}

Nikulov, A. V. ^{[1
]}

Tulin, V. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Microelect Technol, Chernogolovka 142432, Moscow Region, Russia

[2] Moscow Inst Phys & Technol, 29 Inst Skiy Per, Dolgoprudnyi 141700, Moscow Region, Russia

来源：

PHYSICS LETTERS A | 2017年 / 381卷 / 30期

基金：

俄罗斯科学基金会;

关键词：

Bohr-Sommerfeld quantization; Aharonov-Bohm effect; Quantum periodicity; Asymmetric superconducting ring; Persistent current; ELECTROMAGNETIC POTENTIALS; SYSTEM; FORCE;

D O I：

10.1016/j.physleta.2017.05.038

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use superconducting rings with asymmetric link-up of current leads for experimental investigation of winding number change at magnetic field corresponding to the half of the flux quantum inside the ring. According to the conventional theory, the critical current of such rings should change by jump due to this change. Experimental data obtained at measurements of aluminum rings agree with theoretical prediction in magnetic flux region close to integer numbers of the flux quantum and disagree in the region close to the half of the one, where a smooth change is observed instead of the jump. First measurements of tantalum ring give a hope for the jump. Investigation of this problem may have both fundamental and practical importance. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：2432 / 2438

页数：7

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