Depinning transition in type-II superconductors

Дата и время публикации : 1997-05-02T09:35:42Z

Авторы публикации и институты :
N. Lutke-Entrup
B. Placais
P. Mathieu
Y. Simon

Ссылка на журнал-издание: Physical Review Letters, Volume 79, Number 13, page 2538 (1997)
Коментарии к cтатье: 4 pages, 4 figures, 14 references
Первичная категория: cond-mat.supr-con

Все категории : cond-mat.supr-con

Краткий обзор статьи: The surface impedance Z(f) of conventional isotropic materials has been carefully measured for frequencies f ranging from 1 kHz to 3 MHz, allowing a detailed investigation of the depinning transition. Our results exhibit the irrelevance of classical ideas to the dynamics of vortex pinning. We propose a new picture, where the linear ac response is entirely governed by disordered boundary conditions of a rough surface, whereas in the bulk vortices respond freely. The universal law for Z(f) thus predicted is in remarkable agreement with experiment, and tentatively applies to microwave data in YBaCuO films.

Category: Physics