Quantum depinning of a pancake vortex from a columnar defect

被引:19
作者
Gorokhov, DA [1 ]
Blatter, G [1 ]
机构
[1] ETH Honggerberg, CH-8093 Zurich, Switzerland
来源
PHYSICAL REVIEW B | 1998年 / 57卷 / 06期
关键词
D O I
10.1103/PhysRevB.57.3586
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We consider the problem of the depinning of a weakly driven (F much less than F-c) pancake vortex from a columnar defect in a Josephson-coupled superconductor, where F denotes the force acting on the vortex (F-c is the critical force). The dynamics of the vortex is supposed to be of the Hall type. The Euclidean action S-Eucl(T) is calculated in the entire temperature range; the result is universal and does not depend on the detailed form of the pinning potential. We show that the transition from quantum-to-classical behavior is second-order like with the temperature T-c of the transition scaling like F-4/3. Special attention is paid to the regime of applicability of our results, in particular, the influence of the large vortex mass appearing in the superclean limit is discussed.
引用
收藏
页码:3586 / 3592
页数:7
相关论文
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