Polymorphism control of superconductivity and magnetism in Cs3C60 close to the Mott transition

Alexey Y. Ganin, Yasuhiro Takabayashi, Peter Jeglič, Denis Arčon, Anton Potočnik, Peter J. Baker, Yasuo Ohishi, Martin T. McDonald, Manolis D. Tzirakis, Alec McLennan, George R. Darling, Masaki Takata, Matthew J. Rosseinsky () and Kosmas Prassides ()
Additional contact information
Alexey Y. Ganin: University of Liverpool
Yasuhiro Takabayashi: Durham University
Peter Jeglič: Institute Jožef Stefan, Jamova 39, 1000 Ljubljana, Slovenia
Denis Arčon: Institute Jožef Stefan, Jamova 39, 1000 Ljubljana, Slovenia
Anton Potočnik: Institute Jožef Stefan, Jamova 39, 1000 Ljubljana, Slovenia
Peter J. Baker: ISIS Pulsed Neutron and Muon Source, STFC Rutherford Appleton Laboratory
Yasuo Ohishi: Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198, Japan
Martin T. McDonald: Durham University
Manolis D. Tzirakis: Durham University
Alec McLennan: University of Liverpool
George R. Darling: University of Liverpool
Masaki Takata: Japan Synchrotron Radiation Research Institute, SPring-8, Hyogo 679-5198, Japan
Matthew J. Rosseinsky: University of Liverpool
Kosmas Prassides: Durham University

Nature, 2010, vol. 466, issue 7303, 221-225

Abstract: Superconducting crystal balls Superconductivity and magnetic order are well known in C60 compounds of the form A3C60 (where A is an alkali metal). The spherical C60 molecular ions in these superconducting crystals are almost exclusively arranged in a face-centred cubic lattice; the one exception is Cs3C60, where the known superconducting phase has a body-centred cubic packing. Now Ganin et al. have isolated the face-centred cubic polymorph of Cs3C60, and show that it too is superconducting, although its magnetic properties are very different from its body-centred cubic counterpart. The identification of these two distinct superconducting crystal structures in the same material should help to elucidate the nature of the subtle interplay between structure, magnetism and superconductivity in this and other high-temperature superconducting systems.

Date: 2010
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DOI: 10.1038/nature09120

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