Broadening of the Berezinskii-Kosterlitz-Thouless transition by correlated disorder

Abstract

The Berezinskii-Kosterlitz-Thouless (BKT) transition in two-dimensional superconductors is usually expected to be protected against disorder. However, its typical signatures in real system, like e.g. the superfluid-density jump, are often at odd with this expectation. Here we show that the disorder-induced granularity of the superconducting state modifies the nucleation mechanism for vortex-antivortex pairs. This leads to a considerable smearing of the universal superfluid-density jump as compared to the paradigmatic clean case, in agreement with experimental observations.

4 pages, 3 figures

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Cited by in corpus (16)

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• Destruction of superconductivity through phase fluctuations in ultrathin a-MoGe films
• BKT universality class in the presence of correlated disorder
• Disordered XY model: effective medium theory and beyond
• Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry
• Finite Temperature Off-Diagonal Long-Range Order for Interacting Bosons
• Pyrolytic Graphite Sheet, a New Adsorption Substrate for Superfluid Thin Films
• Thermal Properties of Vortices on Curved Surfaces
• Kane-Fisher weak link physics in the clean scratched-XY model
• Local imaging of diamagnetism in proximity coupled niobium nano-island arrays on gold thin films
• Vortex supersolid in the XY model with tunable vortex fugacity
• Inhomogeneous phase stiffness in two-dimensional $s$-wave disordered superconductors
• Uniformly frustrated XY model: strengthening of the vortex lattice by intrinsic disorder
• Superfluid response of two-dimensional filamentary superconductors