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Mott localization in the correlated superconductor Cs<sub>3</sub>C<sub>60</sub>resulting from the molecular Jahn-Teller effect
Cs3C60 is a correlated superconductor under pressure, but an insulator under ambient conditions. The mechanism causing this insulating behavior is the combination of Mott localization and the dynamic Jahn-Teller effect. We show evidence from infrared spectroscopy for the dynamic Jahn-Teller distortion. The continuous change with temperature of the splitting of …