BKT universality class in the presence of correlated disorder

Abstract

The correct detection of the Berezinskii-Kosterlitz-Thouless (BKT) transition in quasi-two-dimensional superconductors still remains a controversial issue. Its main signatures, indeed, are often at odds with the theoretical expectations. In a recent work\cite{me} we have shown that the presence of spatially correlated disorder plays a key role in this sense being it the reason underlying the experimentally-observed smearing of the universal superfluid-density jump. In the present paper, we closely investigate the effects of correlated disorder on the BKT transition, addressing specifically the issue whether it changes or not the BKT universality class.

arXiv commentThe present paper has already been submitted as Special Issue "Proceedings of the conference SuperFluctuations 2017"

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• Disordered XY model: effective medium theory and beyond
• Topological magnetic phase transition in Eu-based A-type antiferromagnets
• Kane-Fisher weak link physics in the clean scratched-XY model
• Vortex supersolid in the XY model with tunable vortex fugacity
• Thermodynamic phase diagram of the competition between superconductivity and charge order in cuprates
• Uniformly frustrated XY model: strengthening of the vortex lattice by intrinsic disorder
• Superfluid response of two-dimensional filamentary superconductors