Topological Quasi-2D Semimetal Co3Sn2S2: Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy
Abstract
The electronic structure of the natural topological semimetal Co3Sn2S2 crystals was studied using near-edge x-ray absorption spectroscopy (NEXAFS) and resonant photoelectron spectroscopy (ResPES). Although, the significant increase of the Co\,3d valence band emission is observed at the Co\,2p absorption edge in the ResPES experiments, the spectral weight at these photon energies is dominated by the normal Auger contribution. This observation indicates the delocalised character of photoexcited Co\,3d electrons and is supported by the first-principle calculations. Our results on the investigations of the element- and orbital-specific electronic states near the Fermi level of Co3Sn2S2 are of importance for the comprehensive description of the electronic structure of this materials, which is significant for future applications of this material in different areas of science and technology, including catalysis and water splitting applications.
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