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Time-dependent London approach: Dissipation due to out-of-core normal excitations by moving vortices

TitleTime-dependent London approach: Dissipation due to out-of-core normal excitations by moving vortices
Publication TypeJournal Article
Year of Publication2018
AuthorsKogan, VG
JournalPhysical Review B
Volume97
Pagination094510
Date Published03
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000427798500005
Keywordsmixed-state, physics, superconductors, vortex lattice
Abstract

The dissipative currents due to normal excitations are included in the London description. The resulting time-dependent London equations are solved for a moving vortex and a moving vortex lattice. It is shown that the field distribution of a moving vortex loses its cylindrical symmetry. It experiences contraction that is stronger in the direction of the motion than in the direction normal to the velocity v. The London contribution of normal currents to dissipation is small relative to the Bardeen-Stephen core dissipation at small velocities, but it approaches the latter at high velocities, where this contribution is no longer proportional to v(2). To minimize the London contribution to dissipation, the vortex lattice is oriented so as to have one of the unit cell vectors along the velocity. This effect is seen in experiments and predicted within the time-dependent Ginzburg-Landau theory.

DOI10.1103/PhysRevB.97.094510
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