Grain boundaries in vortex matter

We explore the statistical properties of grain boundaries in the vortex polycrystalline phase of type-II superconductors. Treating grain boundaries as arrays of dislocations interacting through linear elasticity, we show that self-interaction of a deformed grain boundary is equivalent to a nonlocal...

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Authors: Moretti, Paolo, Miguel López, María del Carmen, Zapperi, Stefano
Format: article
Status:Published version
Publication Date:2005
Country:España
Institution:Universidad de Barcelona
Repository:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/10923
Online Access:https://hdl.handle.net/2445/10923
Access Level:Open access
Keyword:Superconductivitat
Cristal·lografia
Superconductors
Superconductivity
Crystallography
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spelling Grain boundaries in vortex matterMoretti, PaoloMiguel López, María del CarmenZapperi, StefanoSuperconductivitatCristal·lografiaSuperconductorsSuperconductivityCrystallographySuperconductorsWe explore the statistical properties of grain boundaries in the vortex polycrystalline phase of type-II superconductors. Treating grain boundaries as arrays of dislocations interacting through linear elasticity, we show that self-interaction of a deformed grain boundary is equivalent to a nonlocal long-range surface tension. This affects the pinning properties of grain boundaries, which are found to be less rough than isolated dislocations. The presence of grain boundaries has an important effect on the transport properties of type-II superconductors as we show by numerical simulations: our results indicate that the critical current is higher for a vortex polycrystal than for a regular vortex lattice. Finally, we discuss the possible role of grain boundaries in vortex lattice melting. Through a phenomenological theory we show that melting can be preceded by an intermediate polycrystalline phase.The American Physical Society2005info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/10923Articles publicats en revistes (Física de la Matèria Condensada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.72.014505Physical Review B, 2005, vol. 72, núm. 1, p. 014505-1-014505-12http://dx.doi.org/10.1103/PhysRevB.72.014505(c) The American Physical Society, 2005info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/109232026-05-27T06:46:51Z
dc.title.none.fl_str_mv Grain boundaries in vortex matter
title Grain boundaries in vortex matter
spellingShingle Grain boundaries in vortex matter
Moretti, Paolo
Superconductivitat
Cristal·lografia
Superconductors
Superconductivity
Crystallography
Superconductors
title_short Grain boundaries in vortex matter
title_full Grain boundaries in vortex matter
title_fullStr Grain boundaries in vortex matter
title_full_unstemmed Grain boundaries in vortex matter
title_sort Grain boundaries in vortex matter
dc.creator.none.fl_str_mv Moretti, Paolo
Miguel López, María del Carmen
Zapperi, Stefano
author Moretti, Paolo
author_facet Moretti, Paolo
Miguel López, María del Carmen
Zapperi, Stefano
author_role author
author2 Miguel López, María del Carmen
Zapperi, Stefano
author2_role author
author
dc.subject.none.fl_str_mv Superconductivitat
Cristal·lografia
Superconductors
Superconductivity
Crystallography
Superconductors
topic Superconductivitat
Cristal·lografia
Superconductors
Superconductivity
Crystallography
Superconductors
description We explore the statistical properties of grain boundaries in the vortex polycrystalline phase of type-II superconductors. Treating grain boundaries as arrays of dislocations interacting through linear elasticity, we show that self-interaction of a deformed grain boundary is equivalent to a nonlocal long-range surface tension. This affects the pinning properties of grain boundaries, which are found to be less rough than isolated dislocations. The presence of grain boundaries has an important effect on the transport properties of type-II superconductors as we show by numerical simulations: our results indicate that the critical current is higher for a vortex polycrystal than for a regular vortex lattice. Finally, we discuss the possible role of grain boundaries in vortex lattice melting. Through a phenomenological theory we show that melting can be preceded by an intermediate polycrystalline phase.
publishDate 2005
dc.date.none.fl_str_mv 2005
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/10923
url https://hdl.handle.net/2445/10923
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.72.014505
Physical Review B, 2005, vol. 72, núm. 1, p. 014505-1-014505-12
http://dx.doi.org/10.1103/PhysRevB.72.014505
dc.rights.none.fl_str_mv (c) The American Physical Society, 2005
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) The American Physical Society, 2005
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv The American Physical Society
publisher.none.fl_str_mv The American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física de la Matèria Condensada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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