Observation of an Electron Pocket Around Time-Reversal Invariant L Point in Chiral <i>α</i>-RhSn<sub>4</sub> by Means of Nano-ARPES
We have investigated electronic structure of α-RhSn4, which are proposed to harbor Kramers–Weyl fermions, by means of angle-resolved photoemission spectroscopy with submicron beam spot (nano-ARPES). Although α-RhSn4 does not have a well-defined cleavage plane, the small beam spot enabled us to select a flat part of the fractured surface and observe band dispersions. The ε Fermi surface discovered by de Haas–van Alphen experiments by Nakamura et al. [J. Phys. Soc. Jpn. 92, 034701 (2023)] is observed by nano-ARPES around L point. The width of the ε band is larger than the prediction of band structure calculations indicating its downward shift from the calculated result. The bottom of the ε band corresponds to a Kramers–Weyl point which is not clearly resolved due to the considerable spectral broadening.
Authors
- Tatsuma D. Matsuda (ORCID: https://orcid.org/0000-0003-3805-5165)
- Yuji Aoki (ORCID: https://orcid.org/0000-0002-0957-3396)
- Ryuji Higashinaka (ORCID: https://orcid.org/0000-0002-7961-6267)
- Alexei Barinov (ORCID: https://orcid.org/0000-0003-4125-3779)
- T. Mizokawa (ORCID: https://orcid.org/0000-0002-7682-2348)
- N. L. Saini (ORCID: https://orcid.org/0000-0003-3684-1517)
- Masaki Hattori (ORCID: https://orcid.org/0000-0002-5369-3627)
- Naoki Nakamura (ORCID: https://orcid.org/0000-0003-2602-1240)
- Genki Hayashi
- M. Kopciuszyński (ORCID: https://orcid.org/0000-0001-7360-6829)
Institutions
- Waseda University (JP)
- AREA Science Park (IT)
- Tokyo Metropolitan University (JP)
- Sapienza University of Rome (IT)
Publication Details
- Journal
- Journal of the Physical Society of Japan
- Published
- 2024-08-23
- DOI
- https://doi.org/10.7566/jpsj.93.094706
- Primary Topic
- Phase-change materials and chalcogenides
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency