Pressure-induced change of the pairing symmetry in superconducting CeCu2Si2 - Condensed Matter > Strongly Correlated ElectronsReportar como inadecuado




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Abstract: Low-temperature T heat-capacity measurements under hydrostatic pressure ofup to p=2.1 GPa have been performed on single-crystalline CeCu2Si2. A broadsuperconducting SC region exists in the T-p phase diagram. In thelow-pressure region antiferromagnetic spin fluctuations and in thehigh-pressure region valence fluctuations had previously been proposed tomediate Cooper pairing. We could identify these two distinct SC regions. Wefound different thermodynamic properties of the SC phase in both regions,supporting the proposal that different mechanisms might be implied in theformation of superconductivity.



Autor: E. Lengyel, M. Nicklas, H. S. Jeevan, G. Sparn, C. Geibel, F. Steglich, Y. Yoshioka, K. Miyake

Fuente: https://arxiv.org/







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