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

Katalin Kamarás, Gyöngyi Klupp, Péter Matus, Alexey Y. Ganin, Alec McLennan, Matthew J. Rosseinsky, Yasuhiro Takabayashi, Martin T. McDonald, Kosmas Prassides

Research output: Contribution to journalConference article

10 Citations (Scopus)

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.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume428
Issue number1
DOIs
Publication statusPublished - Jan 1 2013
Event21st International Symposium on the Jahn-Teller Effect 2012 - Tsukuba, Japan
Duration: Aug 26 2012Aug 31 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Mott localization in the correlated superconductor Cs<sub>3</sub>C <sub>60</sub> resulting from the molecular Jahn-Teller effect'. Together they form a unique fingerprint.

  • Cite this

    Kamarás, K., Klupp, G., Matus, P., Ganin, A. Y., McLennan, A., Rosseinsky, M. J., Takabayashi, Y., McDonald, M. T., & 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]. https://doi.org/10.1088/1742-6596/428/1/012002