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

Autor:	Maccari, I., Benfatto, L., Castellani, C.
Rok vydání:	2017
Předmět:	Condensed Matter - Superconductivity
Zdroj:	Phys. Rev. B 96, 060508 (2017)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.96.060508
Popis:	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. Comment: 4 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1702.05930 Zobrazit plný text záznamu View this record from Arxiv