Hurych, Zdenek D.
M.S. (Master of Science)
Department of Physics
Ultraviolet photoemission spectroscopy was used to study the electronic band structure of Bi₂Te₃. The decay of the Bi 5d core holes via Auger emission in Bi₂Te₃ was observed. Two maxima in the emission of Auger electrons, observed when core holes are created by photons of energy 26.7 and 28.3 eV, respectively are explained in terms of maxima in the joint density of states with possible inclusion of Coulombic interaction. Both Auger peaks are related to the decay of the 5d₅/₂ level of Bi located at 24.2 eV below the valence band maximum. A model density of states (DOS) is derived from the experimental data. The model DOS is compared with a theoretical band DOS derived from the band structure. Another comparison of the model DOS of Bi₂Te₃ is made with that of another group V-VI compound, Sb₂Se₃, which has a vastly different crystal structure.
Davis, David L., "Photoemission study of the electronic band structure of bismuth telluride" (1973). Graduate Research Theses & Dissertations. 4374.
v, 38 pages
Northern Illinois University
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