We report a NMR and magnetometry study on the expanded intercalated fulleride Cs3C60 in both its A15 and face centered cubic structures. NMR allowed us to evidence that both exhibit a first-order Mott transition to a superconducting state, occurring at distinct critical pressures p(c) and temperatures T-c. Though the ground state magnetism of the Mott phases differs, their high T paramagnetic and superconducting properties are found similar, and the phase diagrams versus unit volume per C-60 are superimposed. Thus, as expected for a strongly correlated system, the interball distance is the relevant parameter driving the electronic behavior and quantum transitions of these systems.

NMR Study of the Mott transition to Superconductivity in the two Cs3C60 phases / Y. Ihara; H. Alloul; P. Wzietek; D. Pontiroli; M. Mazzani; M. Riccò. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 104(2010), p. 256402.

NMR Study of the Mott transition to Superconductivity in the two Cs3C60 phases

PONTIROLI, Daniele;MAZZANI, Marcello;RICCO', Mauro
2010

Abstract

We report a NMR and magnetometry study on the expanded intercalated fulleride Cs3C60 in both its A15 and face centered cubic structures. NMR allowed us to evidence that both exhibit a first-order Mott transition to a superconducting state, occurring at distinct critical pressures p(c) and temperatures T-c. Though the ground state magnetism of the Mott phases differs, their high T paramagnetic and superconducting properties are found similar, and the phase diagrams versus unit volume per C-60 are superimposed. Thus, as expected for a strongly correlated system, the interball distance is the relevant parameter driving the electronic behavior and quantum transitions of these systems.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2312992
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