Abstract

The results of a systematic study of a series of dichalcogenides MS2 (M = Ti, Zr, Ta, Mo, W) by X-ray photoelectron spectroscopy (XPS) are reported. Variations in the S 2p binding energies and the valence band spectra are analysed. Through theoretical and experimental comparisons attempts are made to rationalize the observed variations in terms of qualitative and quantitative arguments (“real” atomic charges on sulfur atoms, specific electronic interactions).

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