TY - JOUR
T1 - Superconductivity of Ce-based heavy fermions under pressure
T2 - Valence fluctuation mediated pairing associated with valence instability of Ce
AU - Miyake, K.
AU - Narikiyo, O.
AU - Onishi, Y.
N1 - Funding Information:
We have much benefitted from informative conversations with J. Flouquet, S. Kambe, T.C. Kobayashi and D. Jaccard, and C.M. Varma and H. Maebashi for enlightening discussions. This work is supported by the Grant-in-Aid for COE Research (10CE2004) of the Ministry of Education, Science, Sports and Culture.
PY - 1999
Y1 - 1999
N2 - It is argued that the coincidence of peaks of the residual resistivity and the superconducting transition temperature observed in CeCu2Ge2 under pressure can be understood as a phenomenon of enhanced valence fluctuations associated with rapid valence change which is signaled by rapid decrease of the coefficient A of T2-term of the resistivity. A type of Cooper pairing predicted by this scenario can be different from that mediated by the antiferromagnetic spin fluctuations. The superconductivity observed in isostructural compounds, CeCu2Si2 and CeNi2Ge2, under pressure should be understood in parallel.
AB - It is argued that the coincidence of peaks of the residual resistivity and the superconducting transition temperature observed in CeCu2Ge2 under pressure can be understood as a phenomenon of enhanced valence fluctuations associated with rapid valence change which is signaled by rapid decrease of the coefficient A of T2-term of the resistivity. A type of Cooper pairing predicted by this scenario can be different from that mediated by the antiferromagnetic spin fluctuations. The superconductivity observed in isostructural compounds, CeCu2Si2 and CeNi2Ge2, under pressure should be understood in parallel.
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U2 - 10.1016/S0921-4526(98)00754-6
DO - 10.1016/S0921-4526(98)00754-6
M3 - Article
AN - SCOPUS:9344225137
SN - 0921-4526
VL - 259-261
SP - 676
EP - 677
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -