Electronic structure of Ca sub x C sub 60 fullerides

Photoemission and inverse photoemission studies of Ca{sub {ital x}}C{sub 60} films show insulating character for {ital x}{lt}3{plus minus}0.3 as states derived primarily from the LUMO orbitals of C{sub 60} are occupied. Metallic character is observed at higher Ca content as a second band of states i...

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Bibliographic Details
Published in:	Physical review. B, Condensed matter Vol. 46:12
Main Authors:	Chen, Y., Poirier, D.M., Jost, M.B., Gu, C., Ohno, T.R., Martins, J.L., Weaver, J.H., Chibante, L.P.F., Smalley, R.E.
Format:	Journal Article
Language:	English
Published:	United States 15-09-1992
Subjects:	ALKALINE EARTH METAL COMPOUNDS CALCIUM CARBIDES CALCIUM COMPOUNDS CARBIDES CARBON CARBON COMPOUNDS ELECTRIC CONDUCTIVITY ELECTRICAL EQUIPMENT ELECTRICAL INSULATORS ELECTRICAL PROPERTIES ELECTRONIC STRUCTURE ELEMENTS EMISSION FULLERENES MATERIALS SCIENCE NONMETALS PHOTOEMISSION PHYSICAL PROPERTIES QUANTITY RATIO SECONDARY EMISSION 360204 > Ceramics, Cermets, & Refractories > Physical Properties SOLID CLUSTERS SUPERCONDUCTIVITY
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Summary:	Photoemission and inverse photoemission studies of Ca{sub {ital x}}C{sub 60} films show insulating character for {ital x}{lt}3{plus minus}0.3 as states derived primarily from the LUMO orbitals of C{sub 60} are occupied. Metallic character is observed at higher Ca content as a second band of states is partially occupied. This band has mixed character since it is derived from the LUMO+1 orbitals of C{sub 60} and the Ca {ital s} states. These states are responsible for superconductivity in Ca{sub 5}C{sub 60}.
Bibliography:	None
ISSN:	0163-1829 1095-3795
DOI:	10.1103/PhysRevB.46.7961