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Phase transitions in the two-dimensional random gauge XY model
2003 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 67, no 10Article in journal (Refereed) Published
Abstract [en]

The two-dimensional random gauge XY model, where the quenched random variables are magnetic bond angles uniformly distributed within [(-)rpi,rpi](0less than or equal torless than or equal to1), is studied via Monte Carlo simulations. We investigate the phase diagram in the plane of the temperature T and the disorder strength r and infer, in contrast to a prevailing conclusion in many earlier studies, that the system is superconducting at any disorder strength r for sufficiently low T. It is also argued that the superconducting to normal transition has different nature at weak disorder and strong disorder: termed Kosterlitz-Thouless (KT) type and non-KT type, respectively. The results are compared to earlier works.

Place, publisher, year, edition, pages
2003. Vol. 67, no 10
Keyword [en]
vortex-glass transition, monte-carlo, random-superconductor, spin-glass, temperature, disorder, order
Identifiers
URN: urn:nbn:se:kth:diva-22397DOI: 10.1103/PhysRevB.67.104510ISI: 000182033700083OAI: oai:DiVA.org:kth-22397DiVA, id: diva2:341095
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Holme, PetterKim, Beom Jun
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