Plastic depinning in superconducting vortices

被引：6

作者：

Motohashi, A. ^{[1
]}

Okuma, S.

机构：

[1] Tokyo Inst Technol, Dept Phys, Meguro Ku, 2-12-1 Ohokayama, Tokyo 1528551, Japan

来源：

INTERNATIONAL SYMPOSIUM: NANOSCIENCE AND QUANTUM PHYSICS 2011 (NANOPHYS'11) | 2011年 / 302卷

关键词：

PHASE-TRANSITIONS; IRREVERSIBILITY;

D O I：

10.1088/1742-6596/302/1/012029

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study a plastic depinning phenomenon in a sheared vortex system in a Corbino-disk superconductor, where some vortices are mobile while others remain pinned. We measure the time-dependent voltage V(t) just after the dc drive due to the dc current I with a sharp rise is suddenly applied to the vortex system. We find decaying V(t) toward the steady-state value, indicating that the moving vortices are gradually pinned. The decay time tau(I) diverges at around a depinning current, as determined from the static I - V characteristics. The value of tau is dependent on the initial vortex configuration, while the critical dynamics is insensitive to it. These results provide a. strong support for the plastic depinning transition.

引用

页数：4

共 14 条

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