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APS » Journals » Phys. Rev. B » Volume 47 » Issue 20
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Phys. Rev. B 47, 13843–13847 (1993)

Electronic properties of K-doped C60(111): Photoemission and electron correlation

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P. J. Benning, F. Stepniak, D. M. Poirier, J. L. Martins, and J. H. Weaver
Department of Materials Science and Chemical Engineering, University of Minnesota, Minneapolis, Minnesota 55455

L. P. F. Chibante and R. E. Smalley
Rice Quantum Institute and Departments of Chemistry and Physics, Rice University, Houston, Texas 77251

Received 3 December 1992; published in the issue dated 15 May 1993

High-resolution photoemission provides the signatures of K3C60(111), K4C60, K6C60, and the dilute solid solution of K in C60(111), showing the effects of electron-electron correlation in all of the K-C60 phases. K3C60(111) is a metal with a distinct Fermi-level cutoff but with spectral broadening near EF not predicted by band calculations. K4C60 is an insulator, although band calculations predict metallic character. Photoemission and low-energy-electron-diffraction results demonstrate kinetically limited growth for K-C60 films produced by vapor deposition.

© 1993 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.47.13843
DOI:
10.1103/PhysRevB.47.13843
PACS:
79.60.-i, 61.14.Hg, 71.30.+h
 
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