The electronic band structure of vacuum cleaved single-crystal indium selenide has been investigated by X-ray and ultraviolet photoelectron spectroscopy. The valence band consists of three well separated groups, one derived from the Se 4s levels, and two derived from p-like wavefunctions. The band structure and valence band density of states has been calculated using a tight-binding single-layer approximation and all the major features in the experimental spectra are well accounted for. The spin-orbit splitting and electron loss structure associated with the In 4d core level is also reported.
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Williams, R. H., McCanny, J. V., Murray, R. B., Ley, L., & Kemeny, P. C. (1977). The electronic band structure of indium selenide: Photoemission and theory. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS , 10(8), 1223-1230. https://doi.org/10.1088/0022-3719/10/8/023