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Thermodynamics of a heavy-ion-irradiated superconductor: the zero-field transition
Laboratoire des Solides Irradiés, CNRS-UMR 7642 & CEA/DSM/DRECAM, Ecole Polytechnique, Palaiseau cedex.
Institut Néel, Grenoble.
Institut Néel, Grenoble.
Commissariat à l'Energie Atomique, Grenoble.
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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 α, we argue that such behavior is consistent with recent numerical work [A. Vestergren et al., Phys. Rev. B 70, 054508 (2004)] showing that the introduction of columnar defects changes the universality class of the transition.

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2007. Vol. 75, no 10
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Other Physics Topics
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Fysik
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URN: urn:nbn:se:ltu:diva-10031DOI: 10.1103/PhysRevB.75.100501Local ID: 8c9c3860-f980-11db-b2dd-000ea68e967bOAI: oai:DiVA.org:ltu-10031DiVA: diva2:982971
Note
Validerad; 2007; Bibliografisk uppgift: Paper id:: 100501; 20070503 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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