Sine-Gordon description of Beresinskii-Kosterlitz-Thouless physics at finite magnetic field

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 non-linear effects at low fields above the transition is a typical signature of the fast divergence of the correlation length within the BKT theory.

4 pages, 2 figures, to appear on Physical Review Letters

References in corpus (4)

• Kosterlitz-Thouless behavior in layered superconductors: the role of the vortex-core energy
• Electric field effect modulation of transition temperature, mobile carrier density and in-plane penetration depth in NdBa2Cu3O(7-delta) thin films
• Competition between Vortex Unbinding and Tunneling in an Optical Lattice
• On the applicability of the layered sine-Gordon model for Josephson-coupled high-T_c layered superconductors

Cited by in corpus (9)

• Doping dependence of the vortex-core energy in bilayer films of cuprates
• Size effects in the nonlinear resistance and flux creep in a virtual Berezinskii-Kosterlitz-Thouless state of superconducting films
• New family of sine-Gordon models
• On the renormalization of the bosonized multi-flavor Schwinger model
• Massless fermions in multi-flavor QED_2
• Asymptotic safety in the sine-Gordon model
• Signatures of thermally excited vortices in a superconductor with competing orders
• Helicity modulus in the bilayer XY model by worm algorithm
• Momentum-resolved two-dimensional spectroscopy as a probe of nonlinear quantum field dynamics