Optical signature of flat bands in topological hourglass semimetal Nb<sub>3</sub>SiTe<sub>6</sub>
Abstract Flat electronic bands in condensed matter provide a rich avenue for exploring novel quantum phenomena. Here, we report an optical spectroscopy study of a topological hourglass semimetal Nb 3 SiTe 6 with the electric field of the incident light parallel to its crystalline ab -plane. The ab -plane optical conductivity spectra of Nb 3 SiTe 6 single crystals exhibit a remarkable peak-like feature around 1.20 eV, which is mainly contributed by the direct optical transitions between the two ab-initio -calculation-derived flat bands along the momentum direction Z – U . Our results pave the way for investigating exotic quantum phenomena based on the flat bands in topological hourglass semimetals.
Authors
- Cuiwei Zhang (ORCID: https://orcid.org/0000-0002-1248-6875)
- Shize Cao
- Yun‐Ze Long (ORCID: https://orcid.org/0000-0002-4278-4515)
- Jianzhou Zhao (ORCID: https://orcid.org/0000-0003-1815-9485)
- Yifan Xu (ORCID: https://orcid.org/0000-0002-1573-9217)
- Zhiguo Chen (ORCID: https://orcid.org/0000-0002-8242-4784)
- Youguo Shi (ORCID: https://orcid.org/0000-0002-6610-6989)
- Jianlin Luo (ORCID: https://orcid.org/0000-0002-2916-0804)
Institutions
- Qingdao University (CN)
- Southwest University of Science and Technology (CN)
- Chinese Academy of Sciences (CN)
- Songshan Lake Materials Laboratory (CN)
- Institute of Physics (CN)
Publication Details
- Journal
- Chinese Physics B
- Published
- 2024-12-13
- DOI
- https://doi.org/10.1088/1674-1056/ad9e9c
- Citations
- 2
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.68
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- National Key Research and Development Program of China
- Basic and Applied Basic Research Foundation of Guangdong Province