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説明:

We use a pomp-probe, spin- and angle-resolved photoemission spectroscopy (ARPES) with a 10.7 eV laser accessible up to the Brillouin zone edge, and reveal for the first time the entire band structure, including the unoccupied side, for the elemental bismuth (Bi) with the spin-polarized surface states. Our data identify Bi as in a strong topological insulator phase (Z2=1) against the prediction of most band calculations. Furthermore, we unveil that the unoccupied topological surface states possess spin-polarized saddle points yielding van Hove singularity, providing an excellent platform for the future development of opto-spintronics.

権利情報:

• In Copyright
  ©2024 American Physical Society

キーワード: Photoemission spectroscopy, Topological surface state, Bismuth

刊行年月日: 2024-07-01

出版者: American Physical Society (APS)

掲載誌:

• Physical Review B (ISSN: 24699950) vol. 110 issue. 4 L041401

研究助成金:

• Kao Foundation for Arts and Sciences
• Japan Society for the Promotion of Science JP21H04439
• Japan Society for the Promotion of Science JP21H04652
• Japan Society for the Promotion of Science JP23K13041
• Ministry of Education, Culture, Sports, Science and Technology JPMXS0118068681

原稿種別: 査読前原稿 (Author's original)

MDR DOI: https://doi.org/10.48505/nims.4574

公開URL: https://doi.org/10.1103/physrevb.110.l041401

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更新時刻: 2024-07-08 09:33:57 +0900

MDRでの公開時刻: 2024-07-04 16:30:20 +0900