Observation of Giant Band Splitting in Altermagnetic MnTe
Fuente:
arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
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| _version_ | 1866909129161834496 |
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| author | Osumi, T. Souma, S. Aoyama, T. Yamauchi, K. Honma, A. Nakayama, K. Takahashi, T. Ohgushi, K. Sato, T. |
| author_facet | Osumi, T. Souma, S. Aoyama, T. Yamauchi, K. Honma, A. Nakayama, K. Takahashi, T. Ohgushi, K. Sato, T. |
| contents | We performed angle-resolved photoemission spectroscopy (ARPES) on hexagonal MnTe, a candidate for an altermagnet with a high critical temperature (TN=307 K). By utilizing photon-energy-tunable ARPES in combination with first-principles calculations, we found that the band structure in the antiferromagnetic phase exhibits a strongly anisotropic band-splitting associated with the time-reversal-symmetry breaking, providing the first direct experimental evidence for the altermagnetic band-splitting. The magnitude of the splitting reaches 0.8 eV at non-high-symmetry momentum points, which is much larger than the spin-orbit gap of ~0.3 eV along the GK high-symmetry cut. The present result paves the pathway toward realizing exotic physical properties associated with the altermagnetic spin-splitting. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_10117 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observation of Giant Band Splitting in Altermagnetic MnTe Osumi, T. Souma, S. Aoyama, T. Yamauchi, K. Honma, A. Nakayama, K. Takahashi, T. Ohgushi, K. Sato, T. Materials Science Strongly Correlated Electrons We performed angle-resolved photoemission spectroscopy (ARPES) on hexagonal MnTe, a candidate for an altermagnet with a high critical temperature (TN=307 K). By utilizing photon-energy-tunable ARPES in combination with first-principles calculations, we found that the band structure in the antiferromagnetic phase exhibits a strongly anisotropic band-splitting associated with the time-reversal-symmetry breaking, providing the first direct experimental evidence for the altermagnetic band-splitting. The magnitude of the splitting reaches 0.8 eV at non-high-symmetry momentum points, which is much larger than the spin-orbit gap of ~0.3 eV along the GK high-symmetry cut. The present result paves the pathway toward realizing exotic physical properties associated with the altermagnetic spin-splitting. |
| title | Observation of Giant Band Splitting in Altermagnetic MnTe |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2308.10117 |