Possible Unconventional Superconductivity In Substituted Bafe 2 As 2 Revealed By Magnetic Pair-breaking Studies

dc.creatorRosa P.F.S.
dc.creatorAdriano C.
dc.creatorGaritezi T.M.
dc.creatorPiva M.M.
dc.creatorMydeen K.
dc.creatorGrant T.
dc.creatorFisk Z.
dc.creatorNicklas M.
dc.creatorUrbano R.R.
dc.creatorFernandes R.M.
dc.creatorPagliuso P.G.
dc.date2014
dc.date2015-06-25T17:55:39Z
dc.date2015-11-26T14:40:10Z
dc.date2015-06-25T17:55:39Z
dc.date2015-11-26T14:40:10Z
dc.date.accessioned2018-03-28T21:46:18Z
dc.date.available2018-03-28T21:46:18Z
dc.identifier
dc.identifierScientific Reports. Nature Publishing Group, v. 4, n. , p. - , 2014.
dc.identifier20452322
dc.identifier10.1038/srep06252
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84906871606&partnerID=40&md5=c346290080601d98c327ef54c98cf3d2
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/86879
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/86879
dc.identifier2-s2.0-84906871606
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1250305
dc.descriptionThe possible existence of a sign-changing gap symmetry in BaFe 2 As 2 -derived superconductors (SC) has been an exciting topic of research in the last few years. To further investigate this subject we combine Electron Spin Resonance (ESR) and pressure-dependent transport measurements to investigate magnetic pair-breaking effects on BaFe 1.9 M 0.1 As 2 (M = Mn, Co, Cu, and Ni) single crystals. An ESR signal, indicative of the presence of localized magnetic moments, is observed only for M = Cu and Mn compounds, which display very low SC transition temperature (T c) and no SC, respectively. From the ESR analysis assuming the absence of bottleneck effects, the microscopic parameters are extracted to show that this reduction of T c cannot be accounted by the Abrikosov-Gorkov pair-breaking expression for a sign-preserving gap function. Our results reveal an unconventional spin- and pressure-dependent pair-breaking effect and impose strong constraints on the pairing symmetry of these materials.
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dc.languageen
dc.publisherNature Publishing Group
dc.relationScientific Reports
dc.rightsaberto
dc.sourceScopus
dc.titlePossible Unconventional Superconductivity In Substituted Bafe 2 As 2 Revealed By Magnetic Pair-breaking Studies
dc.typeArtículos de revistas


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