Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
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2025
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| author | Kurumaji, Takashi Facio, Jorge I. Mitsuishi, Natsuki Imajo, Shusaku Gen, Masaki Kimata, Motoi Ye, Linda Graf, David Sakano, Masato Kitamura, Miho Yamagami, Kohei Ishizaka, Kyoko Kindo, Koichi Arima, Taka-hisa |
| author_facet | Kurumaji, Takashi Facio, Jorge I. Mitsuishi, Natsuki Imajo, Shusaku Gen, Masaki Kimata, Motoi Ye, Linda Graf, David Sakano, Masato Kitamura, Miho Yamagami, Kohei Ishizaka, Kyoko Kindo, Koichi Arima, Taka-hisa |
| contents | Nodal-line semimetals are a class of topological materials hosting one dimensional lines of band degeneracy. Kramers nodal-line (KNL) metals/semimetals have recently been theoretically recognized as a class of topological states inherent to all non-centrosymmetric achiral crystal lattices. We investigate the electronic structure of candidate KNL semimetal YAuGe by angle-resolved photoemission spectroscopy (ARPES) and quantum oscillations as well as by density functional theory (DFT) calculations. DFT has revealed that YAuGe hosts KNLs on the G-A-L-M plane of the Brillouin zone, that are protected by the time reversal and mirror-inversion symmetries. Through ARPES and quantum oscillations we identify signatures of hole bands enclosing the G point, and the observed splitting of quantum oscillation frequency with angle is attributed to spin-orbit-coupling-induced band splitting away from the KNLs. Furthermore, we show that the degeneracy of the nodal lines along the G-A line is lifted by the time-reversal-symmetry breaking when the Y is substituted by magnetic R ions (R = rare earth). This becomes a source of Berry curvature and contributes to the anomalous Hall effect in magnetic RAuGe. These findings establish RAuGe as a new class of KNL semimetals offering significant potential for engineering of anomalous magnetotransport properties via magnetic rare-earth substitution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_08973 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution Kurumaji, Takashi Facio, Jorge I. Mitsuishi, Natsuki Imajo, Shusaku Gen, Masaki Kimata, Motoi Ye, Linda Graf, David Sakano, Masato Kitamura, Miho Yamagami, Kohei Ishizaka, Kyoko Kindo, Koichi Arima, Taka-hisa Materials Science Nodal-line semimetals are a class of topological materials hosting one dimensional lines of band degeneracy. Kramers nodal-line (KNL) metals/semimetals have recently been theoretically recognized as a class of topological states inherent to all non-centrosymmetric achiral crystal lattices. We investigate the electronic structure of candidate KNL semimetal YAuGe by angle-resolved photoemission spectroscopy (ARPES) and quantum oscillations as well as by density functional theory (DFT) calculations. DFT has revealed that YAuGe hosts KNLs on the G-A-L-M plane of the Brillouin zone, that are protected by the time reversal and mirror-inversion symmetries. Through ARPES and quantum oscillations we identify signatures of hole bands enclosing the G point, and the observed splitting of quantum oscillation frequency with angle is attributed to spin-orbit-coupling-induced band splitting away from the KNLs. Furthermore, we show that the degeneracy of the nodal lines along the G-A line is lifted by the time-reversal-symmetry breaking when the Y is substituted by magnetic R ions (R = rare earth). This becomes a source of Berry curvature and contributes to the anomalous Hall effect in magnetic RAuGe. These findings establish RAuGe as a new class of KNL semimetals offering significant potential for engineering of anomalous magnetotransport properties via magnetic rare-earth substitution. |
| title | Electronic Structure of Kramers Nodal-Line Semimetal YAuGe and Anomalous Hall Effect Induced by Magnetic Rare-Earth Substitution |
| topic | Materials Science |
| url | https://arxiv.org/abs/2501.08973 |