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Phys. Rev. Lett. 93, 197601 (2004) [4 pages]

Orientation-Dependent C60 Electronic Structures Revealed by Photoemission Spectroscopy

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V. Brouet1,2,3, W. L. Yang1,2, X. J. Zhou2, H. J. Choi4,5, S. G. Louie4,6, M. L. Cohen4,6, A. Goldoni7, F. Parmigiani7, Z. Hussain1, and Z. X. Shen2
1Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
2Stanford Synchrotron Radiation Laboratory and Department of Applied Physics, Stanford University, Stanford, California 94305, USA
3Laboratoire de Physique des Solides, Université Paris-Sud, Bât 510, UMR 8502, 91405 Orsay, France
4Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA
5Korea Institute for Advanced Study, 207-43 Cheongryangri Dongdaemun, Seoul 130-722, Korea
6Materials Science Divisions, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
7Sincrotone Trieste S.C.p.A., Strada Statale 14 Km 163.5, Basovizza, 34012 Trieste, Italy

See Also: Erratum

Received 17 December 2003; published 5 November 2004

We observe, with angle-resolved photoemission, a dramatic change in the electronic structure of two C60 monolayers, deposited, respectively, on Ag (111) and (100) substrates, and similarly doped with potassium to half filling of the C60 lowest unoccupied molecular orbital. The Fermi surface symmetry, the bandwidth, and the curvature of the dispersion at Γ point are different. Orientations of the C60 molecules on the two substrates are known to be the main structural difference between the two monolayers, and we present new band-structure calculations for some of these orientations. We conclude that orientations play a key role in the electronic structure of fullerides.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.197601
DOI:
10.1103/PhysRevLett.93.197601
PACS:
79.60.Jv, 71.28.+d, 73.21.–b, 79.60.Fr

See Also

Erratum: V. Brouet, W. L. Yang, X. J. Zhou, H. J. Choi, S. G. Louie, M. L. Cohen, A. Goldoni, F. Parmigiani, Z. Hussain, and Z. X. Shen, Erratum: Orientation-Dependent C60 Electronic Structures Revealed by Photoemission Spectroscopy [Phys. Rev. Lett. 93, 197601 (2004)], Phys. Rev. Lett. 95, 099903 (2005).

 
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