Specific heat of unconventional superconductivity in NaxCoO2-yH2O

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dc.creatorYang, H. D.
dc.creatorLin, J. -Y.
dc.creatorSun, C. P.
dc.creatorKang, Y. C.
dc.creatorTakada, K.
dc.creatorSasaki, T.
dc.creatorSakurai, H.
dc.creatorTakayama-Muromachi, E.
dc.date2003-08-02
dc.date2004-05-05
dc.date.accessioned2026-07-07T02:52:44Z
dc.date.available2026-07-07T02:52:44Z
dc.descriptionComprehensive studies of the low-temperature specific heat C(T,H) in NaxCoO2-yH2O are presented. At H=0, a very sharp anomaly was observed at T=4.7 K indicating the existence of bulk superconductivity. There exists the T^2 term in C(T,H=0) in the superconducting state manifesting the line nodal superconducting order parameter. The superconducting volume fraction is estimated to be 26.6 % based on the consideration of entropy conservation at Tc for the second-order superconducting phase transition. An abrupt change of the slope in Tc(H) was observed. Possible scenarios such as the multiple phase transitions in the mixed state are discussed.
dc.description10 pages, 4 figures; the statement of entropy imbalance in the previous version was withdrawn
dc.identifierhttps://arxiv.org/abs/cond-mat/0308031
dc.identifierhttp://arxiv.org/abs/cond-mat/0308031
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21952
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSpecific heat of unconventional superconductivity in NaxCoO2-yH2O
dc.typetext

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