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Crossover from three- to two-dimensional behavior of the vortex energies in layered XY models for high-Tc superconductors
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-1564-870X
Nordic Institute of Theoretical Physics, Blegdamsvej.
1991 (English)In: Physical Review B Condensed Matter, ISSN 0163-1829, E-ISSN 1095-3795, Vol. 44, no 1, p. 454-457Article in journal (Refereed) Published
Abstract [en]

We use Monte Carlo simulations of a layered XY model to study phase fluctuations in high-Tc superconductors. A vortex-antivortex interaction dominated by a term linear in the vortex separation is found in the low-temperature regime. This is in agreement with a zero-temperature variational calculation. At temperature just above the two-dimensional (2D) vortex-unbinding temperature, the linear term vanishes and an ordinary 2D vortex behavior is found. This explains the finding that high-Tc superconductors show 2D properties in the vortex fluctuations responsible for the resistivity transition close to the critical temperature.

Place, publisher, year, edition, pages
1991. Vol. 44, no 1, p. 454-457
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Fysik
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URN: urn:nbn:se:ltu:diva-10408DOI: 10.1103/PhysRevB.44.454ISI: A1991FU90200066Scopus ID: 2-s2.0-0011891609Local ID: 93734c60-e6ce-11db-8a98-000ea68e967bOAI: oai:DiVA.org:ltu-10408DiVA, id: diva2:983353
Note
Godkänd; 1991; 20070409 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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