Tunneling studies in a homogeneously disordered s-wave superconductor: NbN

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dc.creatorChockalingam, S. P.
dc.creatorChand, Madhavi
dc.creatorKamlapure, Anand
dc.creatorJesudasan, John
dc.creatorMishra, Archana
dc.creatorTripathi, Vikram
dc.creatorRaychaudhuri, Pratap
dc.date2008-12-21
dc.date.accessioned2026-07-07T12:50:12Z
dc.date.available2026-07-07T12:50:12Z
dc.descriptionWe report the evolution of superconducting properties as a function of disorder in homogeneously disordered epitaxial NbN thin films grown on (100) MgO substrates, studied through a combination of electrical transport, Hall Effect and tunneling measurements. The thickness of all our films are >50nm much larger than the coherence length ~5nm. The effective disorder in different films encompasses a large range, with the Ioffe-Regel parameter varying in the range kFl~1.38-8.77. Tunneling measurements on films with different disorder reveals that for films with large disorder the bulk superconducting transition temperature (Tc) is not associated with a vanishing of the superconducting energy gap, but rather a large broadening of the superconducting density of states. Our results provide strong evidence of the loss of superconductivity via phase-fluctuations in a disordered s-wave superconductor.
dc.descriptionpdf file including figures
dc.identifierhttps://arxiv.org/abs/0812.3983
dc.identifierhttp://arxiv.org/abs/0812.3983
dc.identifierPHYSICAL REVIEW B 79, 094509 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.094509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222614
dc.subjectSuperconductivity
dc.subjectDisordered Systems and Neural Networks
dc.titleTunneling studies in a homogeneously disordered s-wave superconductor: NbN
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