Sine-Gordon description of Beresinskii-Kosterlitz-Thouless vortices in superconductors immersed in an external magnetic field

被引：21
作者：
Centro Studi e Ricerche Enrico Fermi, via Panisperna 89/A, I-00184, Rome, Italy [1 ]
不详 [2 ]
不详 [3 ]
机构：
[1] Centro Studi e Ricerche Enrico Fermi, I-00184, Rome
[2] CNR-SMC-INFM, Department of Physics, University of Rome La Sapienza, I-00185, Rome
[3] DPMC- MaNEP, University of Geneva, CH-1211 Genève 4
来源：
Phys Rev Lett | 2007年 / 20卷
关键词：
Vortex flow;
D O I：
10.1103/PhysRevLett.99.207002
中图分类号：
学科分类号：
摘要：
The Beresinskii-Kosterlitz-Thouless (BKT) physics of vortices in two-dimensional superconductors at finite magnetic field is investigated by means of a field-theoretical approach based on the sine-Gordon model. This description leads to a straightforward definition of the field-induced magnetization and shows that the persistence of nonlinear effects at low fields above the transition is a typical signature of the fast divergence of the correlation length within the BKT theory. © 2007 The American Physical Society.
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