Photoemission spectra and electronic properties of KxC60

Photoemission spectra of vacuum deposited layers of C(60), before and after exposure to K vapor, show that the K donates its conduction electron into the band derived from the lowest unoccupied molecular orbital. A compound with composition of K(3)C(60), corresponding to the maximum conductivity, ha...

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Bibliographic Details
Published in:Science (American Association for the Advancement of Science) 1991-06, Vol.252 (5011), p.1419-1421
Main Authors: WERTHEIM, G. K, ROWE, J. E, BUCHANAN, D. N. E, CHABAN, E. E, HEBARD, A. F, KORTAN, A. R, MAKHIJA, A. V, HADDON, R. C
Format: Article
Language:English
Subjects:
Analysis
Buckminsterfullerene
Carbon compounds
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electron states
Exact sciences and technology
Impurity and defect levels
Photoemission
Physics
Potassium compounds
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Summary:Photoemission spectra of vacuum deposited layers of C(60), before and after exposure to K vapor, show that the K donates its conduction electron into the band derived from the lowest unoccupied molecular orbital. A compound with composition of K(3)C(60), corresponding to the maximum conductivity, has been prepared. In it the potassium atoms presumably occupy both the octahedral and the two tetrahedral interstitial sites of the face-centered-cubic (fcc) C(60) structure.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.252.5011.1419