Valence band photoemission from the GaN(0001) surface

Details Valence band photoemission from the GaN(0001) surface Valence band photoemission from the GaN(0001) surface

1999-05-18

arxiv.org/abs/cond-mat/9905245v1

Physics

Condensed Matter

8 pages, 11 eps files, submitted to PRB

Scientific paper

10.1103/PhysRevB.60.11577

A detailed investigation by one-step photoemission calculations of the GaN(0001)-(1x1) surface in comparison with recent experiments is presented in order to clarify its structural properties and electronic structure. The discussion of normal and off-normal spectra reveals through the identified surface states clear fingerprints for the applicability of a surface model proposed by Smith et al. Especially the predicted metallic bonds are confirmed. In the context of direct transitions the calculated spectra allow to determine the valence band width and to argue in favor of one of two theoretical bulk band structures. Furthermore a commonly used experimental method to fix the valence band maximum is critically tested.

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