Signatures of van Hove singularities in the anisotropic in-plane optical conductivity of the topological semimetal Nb3SiTe6
- We present a temperature-dependent infrared spectroscopy study on the layered topological semimetal Nb3SiTe6 combined with density-functional theory calculations of the electronic band structure and optical conductivity. Our results reveal an anisotropic behavior of the in-plane (ac-plane) optical conductivity, with three pronounced excitations located at around 0.15, 0.28, and 0.41 eV for the polarization of the incident radiation along the c axis. These excitations are well reproduced in the theoretical spectra. Based on the ab initio results, the excitations around 0.15 and 0.28 eV are interpreted as fingerprints of van Hove singularities in the electronic band structure and compared to the findings for other topological semimetals.
| Author: | Jihaan Ebad-AllahGND, Alexander A. TsirlinORCiDGND, Y. L. Zhu, Z. Q. Mao, Christine A. KuntscherORCiDGND |
|---|---|
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/104601 |
| ISSN: | 2469-9950OPAC |
| ISSN: | 2469-9969OPAC |
| Parent Title (English): | Physical Review B |
| Publisher: | American Physical Society (APS) |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2023 |
| Release Date: | 2023/05/25 |
| Volume: | 107 |
| Issue: | 11 |
| First Page: | 115115 |
| DOI: | https://doi.org/10.1103/physrevb.107.115115 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik II | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik VI | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
