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Phys. Rev. Lett. 29, 1103–1105 (1972)

X-Ray Photoemission Valence-Band Spectra and Theoretical Valence-Band Densities of States for Ge, GaAs, and ZnSe

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R. A. Pollak*, L. Ley†, S. Kowalczyk, and D. A. Shirley
Department of Chemistry and Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720

J. D. Joannopoulos‡, D. J. Chadi‡, and Marvin L. Cohen‡
Department of Physics, University of California, Inorganic Materials Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720

Received 2 August 1972; published in the issue dated 16 October 1972

The first high-resolution valence-band x-ray photoemission spectra for Ge, GaAs, and ZnSe are compared with pseudopotential density-of-states calculations. The general agreement between the experimental and theoretical results is quite good. For ZnSe the photoemission spectrum shows the Zn 3d states to be higher in energy than the lowest valence-band s state. In order to obtain this ordering of states in the theoretical calculation, a pseudopotential with an explicit energy dependence is required.

© 1972 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.29.1103
DOI:
10.1103/PhysRevLett.29.1103
PACS:

*In partial fulfillment of the Ph. D. degree.

†On leave from the University of Bonn, Bonn, Germany.

‡Work supported in part by the National Science Foundation under Grant No. GP 13632.

 
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