MgCNi3 : Complex behavior in a strongly coupled superconductor

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dc.creatorWaelte, A.
dc.creatorRosner, H.
dc.creatorJohannes, M. D.
dc.creatorFuchs, G.
dc.creatorMueller, K. -H.
dc.creatorHandstein, A.
dc.creatorNenkov, K.
dc.creatorNarozhnyi, V. N.
dc.creatorDrechsler, S. -L.
dc.creatorShulga, S.
dc.creatorSchultz, L.
dc.date2002-08-19
dc.date.accessioned2026-07-07T02:46:53Z
dc.date.available2026-07-07T02:46:53Z
dc.descriptionPolycrystalline samples of the recently discovered MgCNi3 superconductor were investigated by transport, ac susceptibility, dc magnetization and specific heat measurements in magnetic fields up to 16 T. Consistent results were obtained for the temperature dependence of the upper critical field H_c2(T) from resistance, ac susceptibility and specific heat measurements. A WHH like temperature dependence of H_c2(T) and the quadratic relationship H_c2(0) ~ T_c^2 point to an effective predominant single band behavior near the quasi clean limit. Evidence for strong electron-phonon and electron-paramagnon coupling was found analyzing the specific heat data. The corresponding s- and p-wave scenarios are briefly discussed using calculated densities of states of different Fermi surface sheets.
dc.description8 pages, 11 ps-figures included
dc.identifierhttps://arxiv.org/abs/cond-mat/0208364
dc.identifierhttp://arxiv.org/abs/cond-mat/0208364
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19803
dc.subjectSuperconductivity
dc.titleMgCNi3 : Complex behavior in a strongly coupled superconductor
dc.typetext

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