Mott localization in the correlated superconductor Cs3C 60 resulting from the molecular Jahn-Teller effect

Kamarás, K, Klupp, G, Matus, P, Ganin, AY, McLennan, A, Rosseinsky, MJ ORCID: 0000-0002-1910-2483, Takabayashi, Y, McDonald, MT and Prassides, K (2013) Mott localization in the correlated superconductor Cs3C 60 resulting from the molecular Jahn-Teller effect Journal of Physics Conference Series, 428 (1). 012002-. ISSN 1742-6588, 1742-6596

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Abstract

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 infrared lines is typical Jahn-Teller behavior, reflecting the change in population of solid-state conformers. We conclude that the electronic and magnetic solid-state properties of the insulating state are controlled by molecular phenomena. We estimate the time scale of the dynamic Jahn-Teller effect to be above 10^-11 s and the energy difference between the conformers less than 20 cm^-1.

Item Type:	Article
Additional Information:	6 pages, 4 figures, 1 supplementary movie; XXI International Symposium on the Jahn-Teller Effect, Tsukuba, Japan, August 26-31, 2012
Uncontrolled Keywords:	cond-mat.str-el, cond-mat.str-el, cond-mat.mtrl-sci
Depositing User:	Symplectic Admin
Date Deposited:	02 Aug 2016 13:46
Last Modified:	21 Apr 2026 23:14
DOI:	10.1088/1742-6596/428/1/012002
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002646
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