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- W1665193791 abstract "Contrary to what is observed in many fullerides, the transition temperature of the superconducting (NH3)xNaK2C60 decreases as its cubic lattice parameter increases, when more ammonia is intercalated in the system. To understand the origin of this anomaly we measure the electronic spin susceptibility with SQUID magnetometry and NMR in two differently doped samples. The relation between Tc and the density of states at the Fermi level is found to be opposite to the Migdal-Eliashberg prediction. CP-MAS measurements of the isotropic part of the 13C Knight shift qualitatively confirms this result. 13C NMR relaxation measurements validate the interpretation of the spin susceptibility in terms of density of states, ruling therefore out the presence of strong antiferromagnetic correlations in the Fermi liquid. A possible explanation of the anomaly should take into account the non adiabatic nature of the superconductivity in this compound." @default.
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- W1665193791 date "2001-01-01" @default.
- W1665193791 modified "2023-10-17" @default.
- W1665193791 title "Anomalous superconductivity in (NH[sub 3])[sub x]NaK[sub 2]C[sub 60]" @default.
- W1665193791 doi "https://doi.org/10.1063/1.1426836" @default.
- W1665193791 hasPublicationYear "2001" @default.
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