Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866913785577472000 |
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| author | Yamamoto, Rikako Motoyama, Takeru Iwata, Takuma Kosa, Towa Nishioka, Yukimi Ideura, Kazumasa Arita, Masashi Miyamoto, Koji Okuda, Taichi Kimura, Akio Yamada, Takemi Yanagi, Yuki Onimaru, Takahiro Kuroda, Kenta |
| author_facet | Yamamoto, Rikako Motoyama, Takeru Iwata, Takuma Kosa, Towa Nishioka, Yukimi Ideura, Kazumasa Arita, Masashi Miyamoto, Koji Okuda, Taichi Kimura, Akio Yamada, Takemi Yanagi, Yuki Onimaru, Takahiro Kuroda, Kenta |
| contents | Spin splitting in electronic band structures via antiferromagnetic orders is a new route to control spin-polarized carriers that is available for spintronics applications. Here, we investigated the spin degree of freedom in the electronic band structures of the antiferromagnet NdBi using laser-based spin- and angle-resolved photoemission spectroscopy (laser-SARPES). Our laser-SARPES experiments revealed that the two surface bands that appear in the antiferromagnetic state are spin-polarized in opposite directions as a counterpart of the spin splitting. Moreover, we observed that the spin polarization is antisymmetric to the electron momentum, indicating that spin degeneracy is lifted due the breaking of inversion symmetry at the surface. These results are well reproduced by our density functional theory calculations with the single-q magnetic structure, implying that the spin-split surface state is determined by the breaking of inversion symmetry in concert with the antiferromagnetic order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_16335 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi Yamamoto, Rikako Motoyama, Takeru Iwata, Takuma Kosa, Towa Nishioka, Yukimi Ideura, Kazumasa Arita, Masashi Miyamoto, Koji Okuda, Taichi Kimura, Akio Yamada, Takemi Yanagi, Yuki Onimaru, Takahiro Kuroda, Kenta Materials Science Mesoscale and Nanoscale Physics Spin splitting in electronic band structures via antiferromagnetic orders is a new route to control spin-polarized carriers that is available for spintronics applications. Here, we investigated the spin degree of freedom in the electronic band structures of the antiferromagnet NdBi using laser-based spin- and angle-resolved photoemission spectroscopy (laser-SARPES). Our laser-SARPES experiments revealed that the two surface bands that appear in the antiferromagnetic state are spin-polarized in opposite directions as a counterpart of the spin splitting. Moreover, we observed that the spin polarization is antisymmetric to the electron momentum, indicating that spin degeneracy is lifted due the breaking of inversion symmetry at the surface. These results are well reproduced by our density functional theory calculations with the single-q magnetic structure, implying that the spin-split surface state is determined by the breaking of inversion symmetry in concert with the antiferromagnetic order. |
| title | Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2502.16335 |