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Signatures of new d-wave vortex physics in overdoped Tl2Ba2CuO(6+x) revealed by TF-µ(+)SR.
Brewer, Jess H; Stubbs, Scott L; Liang, Ruixing; Bonn, D A; Hardy, W N; Sonier, J E; MacFarlane, W Andrew; Peets, Darren C.
Afiliación
  • Brewer JH; Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1.
  • Stubbs SL; Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1.
  • Liang R; Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1.
  • Bonn DA; Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8.
  • Hardy WN; Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1.
  • Sonier JE; Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8.
  • MacFarlane WA; Department of Physics and Astronomy, The University of British Columbia, Vancouver, BC, Canada V6T 1Z1.
  • Peets DC; Canadian Institute for Advanced Research, Toronto, Ontario, Canada M5G 1Z8.
Sci Rep ; 5: 14156, 2015 Sep 16.
Article en En | MEDLINE | ID: mdl-26373267
The spontaneous expulsion of applied magnetic field, the Meissner effect, is a defining feature of superconductors; in Type-II superconductors above the lower critical field, this screening takes the form of a lattice of magnetic flux vortices. Using implanted spin-1/2 positive muons, one can measure the vortex lattice field distribution through the spin precession and deduce key parameters of the superconducting ground state, and thereby fundamental properties of the superconducting pairing. Muon spin rotation/relaxation (µSR) experiments have indeed revealed much interesting physics in the underdoped cuprates, where superconductivity is closely related to, or coexistent with, disordered or fluctuating magnetic and charge excitations. Such complications should be absent in overdoped cuprates, which are believed to exhibit conventional Fermi liquid behaviour. These first transverse field (TF)-µ(+)SR experiments on heavily-overdoped single crystals reveal a superfluid density exhibiting a clear inflection point near 0.5Tc, with a striking doping-independent scaling. This reflects hitherto unrecognized physics intrinsic to d-wave vortices, evidently generic to the cuprates, and may offer fundamentally new insights into their still-mysterious superconductivity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Modelos Teóricos Idioma: En Revista: Sci Rep Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Modelos Teóricos Idioma: En Revista: Sci Rep Año: 2015 Tipo del documento: Article Pais de publicación: Reino Unido