Detection of the Phase Shift from a Single Abrikosov Vortex

被引：58

作者：

Golod, T. ^{[1
]}

Rydh, A. ^{[1
]}

Krasnov, V. M. ^{[1
]}

机构：

[1] Stockholm Univ, AlbaNova Univ Ctr, Dept Phys, SE-10691 Stockholm, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 22期

基金：

瑞典研究理事会;

关键词：

JOSEPHSON-JUNCTIONS; SUPERCONDUCTORS; ARRAYS; SYMMETRY; VORTICES;

D O I：

10.1103/PhysRevLett.104.227003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We probe a quantum mechanical phase rotation induced by a single Abrikosov vortex in a superconducting lead, using a Josephson junction, made at the edge of the lead, as a phase-sensitive detector. We observe that the vortex induces a Josephson phase shift equal to the polar angle of the vortex within the junction length. When the vortex is close to the junction it induces a pi step in the Josephson phase difference, leading to a controllable and reversible switching of the junction into the 0-pi state. This in turn results in an unusual Phi(0)/2 quantization of the flux in the junction. The vortex may hence act as a tunable "phase battery'' for quantum electronics.

引用

页数：4

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