Publication
Title
Vortices in a wedge made of a type-I superconductor
Author
Abstract
Using the time-dependent Ginzburg-Landau approach, we analyze vortex states and vortex dynamics in type-I superconductor films with a thickness gradient in one direction. In the thinnest part of the structures under consideration, the equilibrium states manifest the typical type-II vortex patterns with only singly-quantized vortices. At the same time, in the regions with larger thickness the singly-quantized and giant vortices coexist, in a qualitative agreement with our scanning Hall probe microscopy measurements on relatively thick Pb films. In the presence of an external current applied perpendicularly to the thickness gradient direction, the singly-quantized vortices, which enter the wedge through its thinnest edge, merge into giant vortices when propagating to the thicker parts of the structure. Remarkably, the results of our simulations imply that at moderate external current densities a regime is possible where the winding number of giant vortices, formed as a result of vortex coalescence, takes preferentially (or even exclusively) the values given by positive integer powers of two.
Language
English
Source (journal)
New journal of physics / Institute of Physics; German Physical Society. - Bristol
Publication
Bristol : 2015
ISSN
1367-2630
Volume/pages
17(2015), 8 p.
Article Reference
063032
ISI
000358929900001
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
Quantum turbulence in atomic and solid state Bose-Einstein condensates.
Quantum simulation of polaronic effects in quantum gases.
Superfluidity and superconductivity in multicomponent quantum condensates.
Integrated vaccine and infectious disease research.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 03.09.2015
Last edited 12.09.2017
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