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Thermodynamics of a heavy-ion-irradiated superconductor: The zero-field transition
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2007 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 75, no 10Article in journal (Refereed) Published
Abstract [en]

Specific heat measurements show that the introduction of amorphous columnar defects considerably affects the transition from the normal to the superconducting state in zero magnetic field. Experimental results are compared to numerical simulations of the three-dimensional XY model for both the pure system and the system containing random columnar disorder. The numerics reproduce the salient features of experiment, showing in particular that the specific heat peak changes from cusplike to smoothly rounded when columnar defects are added. By considering the specific heat critical exponent alpha, we argue that such behavior is consistent with recent numerical work [A. Vestergren , Phys. Rev. B 70, 054508 (2004)] showing that the introduction of columnar defects changes the universality class of the transition.

Place, publisher, year, edition, pages
2007. Vol. 75, no 10
Keyword [en]
high-temperature superconductors, bose-glass transition, correlated disorder, columnar defects, ybacuo crystals, single-crystals, high-density, upper limit, yba2cu3o7-delta, localization
Identifiers
URN: urn:nbn:se:kth:diva-16497DOI: 10.1103/PhysRevB.75.100501ISI: 000245329100006Scopus ID: 2-s2.0-33947122209OAI: oai:DiVA.org:kth-16497DiVA: diva2:334539
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Wallin, Mats

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