Optimized unconventional superconductivity in a molecular Jahn-Teller metal

Zadik, R. H. et al. (2015) Optimized unconventional superconductivity in a molecular Jahn-Teller metal. Science Advances, 1(3), e1500059. (doi:10.1126/sciadv.1500059)

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Abstract

Understanding the relationship between the superconducting, the neighboring insulating, and the normal metallic state above Tc is a major challenge for all unconventional superconductors. The molecular A3C60 fulleride superconductors have a parent antiferromagnetic insulator in common with the atom-based cuprates, but here, the C603– electronic structure controls the geometry and spin state of the structural building unit via the on-molecule Jahn-Teller effect. We identify the Jahn-Teller metal as a fluctuating microscopically heterogeneous coexistence of both localized Jahn-Teller–active and itinerant electrons that connects the insulating and superconducting states of fullerides. The balance between these molecular and extended lattice features of the electrons at the Fermi level gives a dome-shaped variation of Tc with interfulleride separation, demonstrating molecular electronic structure control of superconductivity.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ganin, Dr Alexey
Authors: Zadik, R. H., Takabayashi, Y., Klupp, G., Colman, R. H., Ganin, A. Y., Potocnik, A., Jeglic, P., Arcon, D., Matus, P., Kamaras, K., Kasahara, Y., Iwasa, Y., Fitch, A. N., Ohishi, Y., Garbarino, G., Kato, K., Rosseinsky, M. J., and Prassides, K.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Science Advances
Publisher:American Association for the Advancement of Science
ISSN:2375-2548
ISSN (Online):2375-2548
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Science Advances 1(3):e1500059
Publisher Policy:Reproduced under a Creative Commons License

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