The valence band dispersions for Bi2Se3 were determined using angle resolved photoelectron spectroscopy. The valence band maximum was found to be located at the γ point and was nondegenerate. The low k-space degeneracy of the valence band maximum (VBM) and the lesser degree of the anisotropy accounted for these materials poor thermoelectric properties as compared to that of Bi2Te3.
ASJC Scopus subject areas
- Physics and Astronomy(all)