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.
|ジャーナル||Journal of Physics: Conference Series|
|出版ステータス||Published - 2013|
|イベント||21st International Symposium on the Jahn-Teller Effect 2012 - Tsukuba, Japan|
継続期間: 2012 8月 26 → 2012 8月 31
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