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The effect of columnar disorder on the superconducting transition of a type-II superconductor in zero applied magnetic field
Kungliga tekniska högskolan, KTH.
Kungliga tekniska högskolan, KTH.
Department of Physics and Astronomy, University of Rochester.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1564-870X
2004 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 70, 54508- p.Article in journal (Refereed) Published
Abstract [en]

We investigate the effect of random columnar disorder on the superconducting phase transition of a type-II superconductor in zero applied magnetic field using numerical simulations of three dimensional XY and vortex loop models. We consider both an unscreened model, in which the bare magnetic penetration length is approximated as infinite, and a strongly screened model, in which the magnetic penetration length is of order the vortex core radius. We consider both equilibrium and dynamic critical exponents. We show that, as in the disorder free case, the equilibrium transitions of the unscreened and strongly screened models lie in the same universality class, however scaling is now anisotropic. We find for the correlation length exponent ν= 1.2±0.1, and for the anisotropy exponent ζ = 1.3±0.1. We find different dynamic critical exponents for the unscreened and strongly screened models.

Place, publisher, year, edition, pages
2004. Vol. 70, 54508- p.
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Other Physics Topics
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Fysik
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URN: urn:nbn:se:ltu:diva-7202DOI: 10.1103/PhysRevB.70.054508Local ID: 587a5060-e6bd-11db-8a98-000ea68e967bOAI: oai:DiVA.org:ltu-7202DiVA: diva2:980091
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Validerad; 2004; 20070409 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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