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.
Observation of an Electron Pocket Around Time-Reversal Invariant L Point in Chiral α-RhSn4 by Means of Nano-ARPES / Hayashi, Genki; Hattori, Masaki; Nakamura, Naoki; Higashinaka, Ryuji; Matsuda, Tatsuma D.; Aoki, Yuji; Kopciuszynski, Marek; Barinov, Alexey; Saini, Naurang L.; Mizokawa, Takashi. - In: JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. - ISSN 0031-9015. - 93:9(2024). [10.7566/jpsj.93.094706]
Observation of an Electron Pocket Around Time-Reversal Invariant L Point in Chiral α-RhSn4 by Means of Nano-ARPES
Saini, Naurang L.;
2024
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
