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Computer simulations of a vortex line motion in type-II superconductors

✍ Scribed by Yoshihisa Enomoto; Ken-ichi Katsumi; Ryuzo Kato; Sadamichi Maekawa

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 535 KB
Volume: 192
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(92)90757-4

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✦ Synopsis

We study a vortex line motion in type-ll superconductors which is driven by vortex line tenston, Lorentz force, pinning force and thermal fluctuations. On the basis of the local stochastic differential equation for the vortex motmn with no torsion approximation, several computer s~mulations are performed to investigate the pruning behavior of the vortex hne. It is shown that at zero temperature for sufficiently high impurity concentration the vortex line is trapped by random tmpurities, that is, the collective pruning occurs, and the temperature eff~t leads to the pinning-depinning transition at a certain temperature.

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