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Title
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Vortex-antivortex dynamics in mesoscopic symmetric and asymmetric superconducting loops with an applied ac current
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Author
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Abstract
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| In the framework of the time-dependent Ginzburg-Landau formalism, we study the dynamics of vortex-antivortex (V-Av) pairs in mesoscopic symmetric and asymmetric superconducting loops under an applied ac current. In contrast to the case of a constant biasing dc current, the process of the V-Av collision and annihilation is strongly affected by the time-periodic ac signal. As the direction of the applied ac current is reversed, the existed V-Av pair moves backward and then collides with a new created Av-V pair in a symmetric loop. In the presence of an appropriate external magnetic field, a novel sinusoidal-like oscillatory mode of the magnetization curve is observed, and the periodic dynamical process of the V-Av annihilation occurs in both branches of the sample. Moreover, for the asymmetric sample with an off-centered hole the creation point of the V-Av pair shifts away from the center of the sample, and the creation and annihilation dynamics of V-Av pairs turns out to be very different from the symmetric case. Copyright (C) EPLA, 2014 |
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Language
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English
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Source (journal)
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Europhysics letters / Société européenne de physique. - Les Ulis, 1986, currens
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Publication
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Les Ulis
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Les éditions de physique
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2014
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ISSN
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0295-5075
1286-4854
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DOI
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10.1209/0295-5075/108/57001
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Volume/pages
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108
:5
(2014)
, 6 p.
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Article Reference
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57001
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ISI
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000346792400027
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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