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Universal role of combined symmetry for the protection of the Dirac cone in antiferromagnetic topological insulators
https://repo.qst.go.jp/records/2001335
https://repo.qst.go.jp/records/20013353fa63ec5-8c4f-4082-9427-96f00c736300
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||||||||||||||||||||||||||
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| 公開日 | 2024-10-18 | |||||||||||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||||||||||
| タイトル | Universal role of combined symmetry for the protection of the Dirac cone in antiferromagnetic topological insulators | |||||||||||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||||||||||||||||
| 言語 | eng | |||||||||||||||||||||||||||||||||||||
| 資源タイプ | ||||||||||||||||||||||||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||||||||||||||||
| 資源タイプ | journal article | |||||||||||||||||||||||||||||||||||||
| 著者 |
Asuka Honma(Tohoku Univ.)
× Asuka Honma(Tohoku Univ.)
× Noriyuki Kabeya(Tohoku Univ.)
× Seigo Souma(CSIS.Tohoku Univ.)
× Yongjian Wang(Univ. of Cologne)
× Kunihiko Yamauchi(CSRN.Osaka Univ.)
× Kosuke Nakayama(Tohoku Univ.)
× Daichi Takane(Tohoku Univ.)
× Kenichi Ozawa(KEK)
× Kitamura Miho
× Horiba Koji
× Hiroshi Kumigashira(Tohoku Univ.)
× Tamio Oguchi(CSRN.Osaka Univ.)
× Takashi Takahashi(Tohoku Univ.)
× Noriaki Kimura(Tohoku Univ.)
× Yoichi Ando(Univ. of Cologne)
× Takafumi Sato(WPI-AIMR.Tohoku Univ.)
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| 内容記述タイプ | Abstract | |||||||||||||||||||||||||||||||||||||
| 内容記述 | Antiferromagnetic topological insulators (AFM TIs) are predicted to exhibit exotic physical properties such as gigantic optical and topological magnetoelectric responses. While a key to achieving such phenomena relies on how to break the symmetry protecting the Dirac-cone surface state (SS) and acquire the mass of Dirac fermions, the mechanism has yet to be clarified. To address this issue, we carried out microfocused angle-resolved photoemission spectroscopy for GdBi hosting the type-II AFM order, and uncovered the stripe-type 2 × 1 reconstruction of the Fermi surface associated with the AFM band folding. Intriguingly, in contrast to NdBi with the type-I AFM order displaying the surface-selective Dirac-fermion mass, GdBi shows massless behavior irrespective of AFM domains due to the robust topological protection. These results strongly suggest a crucial role of the ΘTD (time-reversal and translational) symmetry to create the Dirac-fermion mass in AFM TIs. | |||||||||||||||||||||||||||||||||||||
| 書誌情報 |
Physical Review B 巻 110, 号 11, p. 1-10, 発行日 2024-09 |
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| 出版者 | American Physical Society | |||||||||||||||||||||||||||||||||||||
| DOI | ||||||||||||||||||||||||||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||||||||||||||||||||||||
| 関連識別子 | 10.1103/PhysRevB.110.115152 | |||||||||||||||||||||||||||||||||||||
