Topological Quasi-2D Semimetal Co$_3$Sn$_2$S$_2$: Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy

Mouhui Yan; Yichen Jin; Xiaofei Hou; Yanfeng Guo; Arshak Tsaturyan; Anna Makarova; Dmitry Smirnov; Yuriy Dedkov; Elena Voloshina

doi:10.1021/acs.jpclett.1c02790

paper

Topological Quasi-2D Semimetal Co $_{3}$ Sn $_{2}$ S $_{2}$ : Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy

arXiv:2112.12527 · doi:10.1021/acs.jpclett.1c02790

Abstract

The electronic structure of the natural topological semimetal Co $_{3}$ Sn $_{2}$ S $_{2}$ crystals was studied using near-edge x-ray absorption spectroscopy (NEXAFS) and resonant photoelectron spectroscopy (ResPES). Although, the significant increase of the Co\, $3 d$ valence band emission is observed at the Co\, $2 p$ 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\, $3 d$ 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 Co $_{3}$ Sn $_{2}$ S $_{2}$ 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.

Topological Quasi-2D Semimetal Co3​Sn2​S2​: Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy

Abstract

Topological Quasi-2D Semimetal Co $_{3}$ Sn $_{2}$ S $_{2}$ : Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy