Details of Grant 

EPSRC Reference:	GR/S77820/01
Title:	Frustration, orbital degeneracy, new insulating states and correlation enhancement in superconducting fullerides.
Principal Investigator:	Prassides, Professor K
Other Investigators:
Researcher Co-Investigators:
Project Partners:	Tohoku University
Department:	Chemistry
Organisation:	University of Sussex
Scheme:	Standard Research (Pre-FEC)
Starts:	01 June 2004	Ends:	31 December 2004	Value (£):	194,790
EPSRC Research Topic Classifications:	Materials Synthesis & Growth
EPSRC Industrial Sector Classifications:	Chemicals Electronics
Related Grants:	GR/S77790/01
Panel History:
Summary on Grant Application Form
This proposal builds directly on recent discoveries by the proposing groups in the solid state science of fulleride-based systems. Metal fullerides, which display superconductivity at temperatures as high as 40 K, have emerged recently as archetypal strongly correlated electron systems. Their unique electronic and crystal structures allow them to display both previously unsuspected aspects of the important Mott-Hubbard model and spectacular physical properties such as intermediate valence behaviour. These are of generic significance as most high-Tc superconductors are located precisely at metal-insulator boundaries and there are clear recent theoretical predictions that the strong correlations intrinsic in these systems may provide a mechanism for further enhancement of fulleride superconductivity above 40 K. Band filling, orbital degeneracy and lattice frustration will be tuned through chemical and physical control in alkali and alkaline-earth fulleride materials. The coupling between metal f electron and fulleride electronic structures will open up a large area of new opportunities. The new area of intermediate valence lanthanide fullerides, in which strong electronic correlations dominate the electronic properties of both the rare-earth cation and C6o anion sublattices resulting in strong coupling between the charge (valence), lattice and spin degrees of freedom, will be explored. The programme exploits the complementary expertise of the two principal investigators and will lead to a new generation of novel fullerene-based materials with unpredictable and theoretically challenging properties.
Key Findings
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Further Information:
Organisation Website:	http://www.sussex.ac.uk