Edge Tunneling of Vortices in Superconducting Thin Films

Дата и время публикации : 1996-08-13T20:33:59Z

Авторы публикации и институты :
Roberto Iengo (SISSA Trieste)
Giancarlo Jug (U. of Milan)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: REVTeX file, 15 pages, 1 Postscript figure; to appear in Phys.Rev.B
Первичная категория: cond-mat

Все категории : cond-mat, hep-th, supr-con

Краткий обзор статьи: We investigate the phenomenon of the decay of a supercurrent due to the zero-temperature quantum tunneling of vortices from the edge in a thin superconducting film in the absence of an external magnetic field. An explicit formula is derived for the tunneling rate of vortices, which are subject to the Magnus force induced by the supercurrent, through the Coulomb-like potential barrier binding them to the film’s edge. Our approach ensues from the non-relativistic version of a Schwinger-type calculation for the decay of the 2D vacuum previously employed for describing vortex-antivortex pair-nucleation in the bulk of the sample. In the dissipation-dominated limit, our explicit edge-tunneling formula yields numerical estimates which are compared with those obtained for bulk-nucleation to show that both mechanisms are possible for the decay of a supercurrent.

Category: Physics