Kasahara, Y, Takeuchi, Y, Zadik, RH, Takabayashi, Y, Colman, RH, McDonald, RD, Rosseinsky, MJ 
ORCID: 0000-0002-1910-2483, Prassides, K and Iwasa, Y
(2017)
Upper critical field reaches 90 tesla near the Mott transition in fulleride superconductors.
NATURE COMMUNICATIONS, 8 (1).
14467-.
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Upper critical field reaches 90 tesla near the Mott transition in fulleride superconductors.pdf - Author Accepted Manuscript Download (763kB) |
Abstract
Controlled access to the border of the Mott insulating state by variation of control parameters offers exotic electronic states such as anomalous and possibly high-transition-temperature (T<sub>c</sub>) superconductivity. The alkali-doped fullerides show a transition from a Mott insulator to a superconductor for the first time in three-dimensional materials, but the impact of dimensionality and electron correlation on superconducting properties has remained unclear. Here we show that, near the Mott insulating phase, the upper critical field H<sub>c2</sub> of the fulleride superconductors reaches values as high as ∼90 T-the highest among cubic crystals. This is accompanied by a crossover from weak- to strong-coupling superconductivity and appears upon entering the metallic state with the dynamical Jahn-Teller effect as the Mott transition is approached. These results suggest that the cooperative interplay between molecular electronic structure and strong electron correlations plays a key role in realizing robust superconductivity with high-T<sub>c</sub> and high-H<sub>c2</sub>.
| Item Type: | Article |
|---|---|
| Depositing User: | Symplectic Admin |
| Date Deposited: | 30 Mar 2017 09:48 |
| Last Modified: | 19 Jan 2023 07:07 |
| DOI: | 10.1038/ncomms14467 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3006721 |
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