QUANTUM DEPINNING OF FLUX LINES FROM COLUMNAR DEFECTS

被引：23

作者：

CHUDNOVSKY, EM ^{[1
]}

FERRERA, A ^{[1
]}

VILENKIN, A ^{[1
]}

机构：

[1] TUFTS UNIV,DEPT PHYS,MEDFORD,MA 02155

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.51.1181

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The depinning of a flux line from a columnar defect is studied within the path-integral approach. Instantons of the quantum field theory in 1+1 dimensions are computed for the flux line whose dynamics is dominated by the Magnus force. The universal temperature dependence of the decay rate in the proximity of the critical current is obtained. This problem provides an example of macroscopic quantum tunneling, which is accessible to the direct comparison between theory and experiment. © 1995 The American Physical Society.

引用

收藏

页码：1181 / 1184

页数：4

相关论文

共 28 条

[1] BERRY PHASE AND THE MAGNUS FORCE FOR A VORTEX LINE IN A SUPERCONDUCTOR [J].

AO, P ;

THOULESS, DJ .

PHYSICAL REVIEW LETTERS, 1993, 70 (14) :2158-2161

[2] TUNNELING OF A QUANTIZED VORTEX - ROLES OF PINNING AND DISSIPATION [J].

AO, P ;

THOULESS, DJ .

PHYSICAL REVIEW LETTERS, 1994, 72 (01) :132-135

[3] THEORY OF MOTION OF VORTICES IN SUPERCONDUCTORS [J].

BARDEEN, J ;

STEPHEN, MJ .

PHYSICAL REVIEW, 1965, 140 (4A) :1197-+

[4] MOTION OF QUANTIZED FLUX LINES IN SUPERCONDUCTORS [J].

BARDEEN, J .

PHYSICAL REVIEW LETTERS, 1964, 13 (25) :747-&

[5] QUANTUM COLLECTIVE CREEP - EFFECTS OF ANISOTROPY, LAYERING, AND FINITE TEMPERATURE [J].

BLATTER, G ;

GESHKENBEIN, V .

PHYSICAL REVIEW B, 1993, 47 (05) :2725-2741

[6] QUANTUM COLLECTIVE CREEP [J].

BLATTER, G ;

GESHKENBEIN, VB ;

VINOKUR, VM .

PHYSICAL REVIEW LETTERS, 1991, 66 (25) :3297-3300

[7] QUANTUM TUNNELLING IN A DISSIPATIVE SYSTEM [J].

CALDEIRA, AO ;

LEGGETT, AJ .

ANNALS OF PHYSICS, 1983, 149 (02) :374-456

[8] QUANTUM TUNNELING OF MAGNETIZATION IN SMALL FERROMAGNETIC PARTICLES [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW LETTERS, 1988, 60 (08) :661-664

[9] QUANTUM-THEORY OF NUCLEATION IN FERROMAGNETS [J].

CHUDNOVSKY, EM ;

GUNTHER, L .

PHYSICAL REVIEW B, 1988, 37 (16) :9455-9459

[10] MAGNUS FORCES AND STATISTICS IN 2+1 DIMENSIONS [J].

DAVIS, RL .

MODERN PHYSICS LETTERS A, 1990, 5 (11) :853-862