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dc.contributor.authorMayoh, Jamesen
dc.contributor.authorGarcía-García, Antonio Men
dc.date.accessioned2015-12-02T10:29:05Z
dc.date.available2015-12-02T10:29:05Z
dc.date.issued2015-11-23en
dc.identifier.citationMayoh & García-García. Physical Review B (2015) Vol. 92, 174526. doi: 10.1103/PhysRevB.92.174526en
dc.identifier.issn1098-0121
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/252793
dc.description.abstractThere is growing evidence that a key feature of sufficiently disordered superconductors is the spatial inhomogeneity of the order parameter. However, not much is known analytically about the impact of the inhomogeneity on the global critical temperature that signals the onset of resistance in the superconductor. Here we address this problem in the experimentally relevant case of disordered conventional superconductors characterized by weak multifractality such as quasi-two-dimensional thin films. We compute analytically the superconducting energy gap, the temperature at which it vanishes, and the energy dependence and spatial distribution of the order parameter. The latter is found to be log normal. The global critical temperature, computed by percolation techniques, is much smaller than the temperature at which the energy gap vanishes. We show that disorder might enhance superconductivity but only for very weakly coupled superconductors, such as Al, and for relatively weak phase fluctuations. These results are consistent with experiments where enhancement of the critical temperature is observed in Al thin films but not in more strongly coupled materials.
dc.description.sponsorshipA.M.G. was supported by EPSRC, Grant No. EP/I004637/1, FCT, Grant PTDC/FIS/111348/2009, and a Marie Curie International Reintegration Grant PIRG07-GA-2010-268172. J.M. acknowledges the support of an EPSRC Ph.D. studentship.
dc.languageEnglishen
dc.language.isoenen
dc.publisherAPS
dc.titleGlobal critical temperature in disordered superconductors with weak multifractalityen
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from APS via http://dx.doi.org/10.1103/PhysRevB.92.174526en
prism.number174526en
prism.publicationDate2015en
prism.publicationNamePhysical Review Ben
prism.volume92en
dc.rioxxterms.funderEPSRC
dc.rioxxterms.projectidEP/I004637/1
rioxxterms.versionofrecord10.1103/PhysRevB.92.174526en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-11-23en
dc.identifier.eissn1550-235X
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (EP/I004637/1)


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