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Sine-Gordon Description of Beresinskii-Kosterlitz-Thouless Vortices in Superconductors Immersed in an External Magnetic Field

Authors
Benfatto, L.
Castellani, C.
Published in Physical Review Letters. 2007, vol. 99, no. 20
Abstract 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.
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BENFATTO, L., CASTELLANI, C., GIAMARCHI, Thierry. Sine-Gordon Description of Beresinskii-Kosterlitz-Thouless Vortices in Superconductors Immersed in an External Magnetic Field. In: Physical Review Letters, 2007, vol. 99, n° 20. https://archive-ouverte.unige.ch/unige:36061

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Deposited on : 2014-04-28

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