Fate of the Peak Effect in a Type-II Superconductor: Multicriticality in the Bragg-Glass Transition

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dc.creatorPark, S. R.
dc.creatorChoi, S. M.
dc.creatorDender, D. C.
dc.creatorLynn, J. W.
dc.creatorLing, X. S.
dc.date2003-05-23
dc.date2003-10-24
dc.date.accessioned2026-07-07T02:51:31Z
dc.date.available2026-07-07T02:51:31Z
dc.descriptionWe have used small-angle-neutron-scattering (SANS) and ac magnetic susceptibility to investigate the global magnetic field H vs temperature T phase diagram of a single crystal Nb in which a first-order transition of Bragg-glass melting (disordering), a peak effect, and surface superconductivity are all observable. It was found that the disappearance of the peak effect is directly related to a multicritical behavior in the Bragg-glass transition. Four characteristic phase boundary lines have been identified on the H-T plane: a first-order line at high fields, a mean-field-like continuous transition line at low fields, and two continuous transition line associated with the onset of surface and bulk superconductivity. All four lines are found to meet at a multicritical point.
dc.description4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0305569
dc.identifierhttp://arxiv.org/abs/cond-mat/0305569
dc.identifierPhys. Rev. Lett. Vol.91, 167003 (2003)
dc.identifierdoi:10.1103/PhysRevLett.91.167003
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21486
dc.subjectSuperconductivity
dc.titleFate of the Peak Effect in a Type-II Superconductor: Multicriticality in the Bragg-Glass Transition
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