Mott localization in the correlated superconductor Cs3C60 resulting from the molecular Jahn-Teller effect

Kamaras, Katalin, Klupp, Gyongyi, Matus, Peter, Ganin, Alexey Y, McLennan, Alec, Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483, Takabayashi, Yasuhiro, McDonald, Martin T and Prassides, Kosmas (2013) Mott localization in the correlated superconductor Cs3C60 resulting from the molecular Jahn-Teller effect. Journal of Physics: Conference Series, 428 (1). 012002-.

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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:	19 Jan 2023 07:32
DOI:	10.1088/1742-6596/428/1/012002
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3002646