Photoelectron spin interference studied for the basic theory of spin- and angle-resolved photoemission spectroscopy

• Project/Area Number: 18K03484
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
• Research Institution: National Institute for Materials Science (2020); The University of Tokyo (2018-2019)
• Principal Investigator: YAJI Koichiro 国立研究開発法人物質・材料研究機構, 先端材料解析研究拠点, グループリーダー (50447447)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: スピン軌道結合 / スピン干渉 / スピン角度分解光電子分光 / 表面状態 / スピン分解光電子分光 / 対称性 / 固体表面 / 表面電子物性 / スピン軌道相互作用

Outline of Final Research Achievements

Spin- and angle-resolved photoemission spectroscopy (SARPES) is a powerful technique to to investigate strongly spin-orbit coupled electronic states. However, the correspondence between the spin structure in the initial state and that in the photoexcited state is not obvious since SARPES provides the information of photoelectrons that can be changed with the matrix element effect of photoemission. In the present study, we have elucidated the spin interference in the photoemission process with mirror symmetry. We have developed a basic theory to obtain the spin information in the initial state from the spin structure of photoelectrons observed with SARPES.

Academic Significance and Societal Importance of the Research Achievements

トポロジカル物質などの強いスピン軌道相互作用が重要な電子スピン物性分野の登場により、スピン角度分解光電子分光は電子状態測定手法として広く使われるようになった。しかしながら、そのデータ解釈の方法については曖昧にされたままあった。本研究では、同手法の基礎学理を構築し、電子スピン物性に関する物理を大きく進展させることに貢献した。また本研究で得られた成果は、光励起過程における位相の自由度も利用してスピンを制御できるという新たな概念となり、例えばスピン偏極電子源の開発に応用できる。

Research Products

• [Int'l Joint Research] 杭州師範大学/浙江大学(中国)
• [Journal Article] Structure and electronic structure of van der Waals interfaces at a Au(1 1 1) surface covered with a well-ordered molecular layer of n-alkanes (2021)
  • Author(s): Mizushima Hirotaka、Koike Harunobu、Kuroda Kenta、Yaji Koichiro、Harasawa Ayumi、Ishida Yukiaki、Nakayama Mitsuhiro、Mase Kazuhiko、Mukai Kozo、Kitazawa Tatsuya、Kondo Takeshi、Yoshinobu Jun、Shin Shik、Kanai Kaname
  • Journal Title: Applied Surface Science Volume: 535 Pages: 147673-147673
  • DOI: 10.1016/j.apsusc.2020.147673
  • Peer Reviewed
• [Journal Article] Evidence for a higher-order topological insulator in a three-dimensional material built from van der Waals stacking of bismuth-halide chains (2021)
  • Author(s): Noguchi Ryo、Kobayashi Masaru、J. Zhanzhi、Kuroda Ken
  • Journal Title: Nature Materials Volume: 20 Issue: 4 Pages: 473-479
  • DOI: 10.1038/s41563-020-00871-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Observation and control of the weak topological insulator state in ZrTe5 (2021)
  • Author(s): Zhang Peng、Noguchi Ryo、Kuroda Kenta、Lin Chun、Kawaguchi Kaishu、Yaji Koichiro、Harasawa Ayumi、Lippmaa Mikk、Nie Simin、Weng Hongming、Kandyba V.、Giampietri A.、Barinov A.、Li Qiang、Gu G. D.、Shin Shik、Kondo Takeshi
  • Journal Title: Nature Communications Volume: 12 Issue: 1 Pages: 406-406
  • DOI: 10.1038/s41467-020-20564-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Atomic-layer Rashba-type superconductor protected by dynamic spin-momentum locking (2021)
  • Author(s): Yoshizawa Shunsuke、Kobayashi Takahiro、Nakata Yoshitaka、Yaji Koichiro、Yokota Kenta、Komori Fumio、Shin Shik、Sakamoto Kazuyuki、Uchihashi Takashi
  • Journal Title: Nature Communications Volume: 12 Issue: 1 Pages: 1462-1462
  • DOI: 10.1038/s41467-021-21642-1
  • Peer Reviewed / Open Access
• [Journal Article] Topological Surface State of Bi2Se3 Modified by Adsorption of Organic Donor Molecule Tetrathianaphthacene (2020)
  • Author(s): Kitazawa Tatsuya、Yaji Koichiro、Shimozawa Kosuke、Kondo Hiroshi、Yamanaka Takayoshi、Yaguchi Hiroshi、Ishida Yukiaki、Kuroda Kenta、Harasawa Ayumi、Iwahashi Takashi、Ouchi Yukio、Komori Fumio、Shin Shik、Kanai Kaname
  • Journal Title: Advanced Materials Interfaces Volume: 7 Issue: 14 Pages: 2000524-2000524
  • DOI: 10.1002/admi.202000524
  • Peer Reviewed
• [Journal Article] Nature of the Dirac gap modulation and surface magnetic interaction in axion antiferromagnetic topological insulator $${\hbox {MnBi}}_2 {\hbox {Te}}_4$$ (2020)
  • Author(s): Shikin A. M.、Estyunin D. A.、Klimovskikh I. I.、Filnov S. O.、Schwier E. F.、Kumar S.、Miyamoto K.、Okuda T.、Kimura A.、Kuroda K.、Yaji K.、Shin S.、Takeda Y.、Saitoh Y.、Aliev Z. S.、Mamedov N. T.、Amiraslanov I. R.、Babanly M. B.、Otrokov M. M.、Eremeev S. V.、Chulkov E. V.
  • Journal Title: Scientific Reports Volume: 10 Issue: 1
  • DOI: 10.1038/s41598-020-70089-9
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Orbital angular momentum induced spin polarization of 2D metallic bands (2020)
  • Author(s): Takahiro Kobayashi, Yoshitaka Nakata, Koichiro Yaji, Tatsuya Shishidou, Daniel Agterberg, Shunsuke Yoshizawa, Fumio Komori, Shik Shin, Michael Weinert, Takashi Uchihashi, and Kazuyuki Sakamoto
  • Journal Title: Physical Review Letters Volume: 125 Issue: 17 Pages: 176401-176401
  • DOI: 10.1103/physrevlett.125.176401
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fully spin polarised bulk states in ferroelectric GeTe (2020)
  • Author(s): J. Krempasky, M. Fanciulli, L. Nicolai, J. Minar, H. Volfova, O. Caha, V. V. Volobuev, J. Sanchez-Barriga, K. Kuroda, K. Yaji, S. Shin, F. Komori, G. Springholz and J. H. Dil
  • Journal Title: Physical Review Research Volume: 2 Issue: 1 Pages: 013107-013107
  • DOI: 10.1103/physrevresearch.2.013107
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Unified description of the electronic structure of M2AC nanolamellar carbides (2019)
  • Author(s): D. Pinek, T. Ito, M. Ikemoto, K. Yaji, M. Nakatake, S. Shin, T. Ouisse
  • Journal Title: Physical Review B Volume: 100 Issue: 7 Pages: 075144-075144
  • DOI: 10.1103/physrevb.100.075144
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Fermi level tuning of one-dimensional giant Rashba system on a semiconductor substrate: Bi/GaSb(110)-(2×1) (2019)
  • Author(s): T. Nakamura, Y. Ohtsubo, N. Tokumasu, P. Le Fevre, F. Bertran, S. Ideta, K. Tanaka, K. Kuroda, K. Yaji, A. Harasawa, S. Shin, F. Komori , S. Kimura
  • Journal Title: Physical Review Materials Volume: 3 Issue: 12 Pages: 126001-126001
  • DOI: 10.1103/physrevmaterials.3.126001
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Coexistence of two types of spin splitting originating from different symmetries (2019)
  • Author(s): Koichiro Yaji, Anton Visikovskiy, Takushi Iimori, Kenta Kuroda, Singo Hayashi, Takashi Kajiwara, Satoru Tanaka, Fumio Komori and Shik Shin
  • Journal Title: Physical Review Letters Volume: 122 Issue: 12 Pages: 126403-126403
  • DOI: 10.1103/physrevlett.122.126403
  • Peer Reviewed / Int'l Joint Research
• [Presentation] スピン角度分解光電子分光・光電子顕微鏡の開発 (2021)
  • Author(s): 矢治光一郎、津田俊輔
  • Organizer: NIMS先端計測シンポジウム2021
• [Presentation] 偏光励起SARPESで解き明かすスピン軌道結合電子状態 (2021)
  • Author(s): 矢治光一郎
  • Organizer: SCTM2020 ワークショップ「超伝導物質、トポロジカル物質」
  • Invited
• [Presentation] スピン角度分解光電子分光による電子状態計測 ～物質研究から材料研究へ～ (2021)
  • Author(s): 矢治光一郎
  • Organizer: 日本表面真空学会2021年度関東支部講演大会
  • Invited
• [Presentation] 偏光励起SARPESで観測するスピン軌道結合電子状態 (2020)
  • Author(s): 矢治光一郎，黒田健太，小森文夫，辛埴
  • Organizer: 第33回日本放射光学会年会・放射光科学合同シンポジウム
• [Presentation] Coexistence of Zeeman- and Rashba-type spin-split bands for a Sn atomic layer on SiC(0001) (2019)
  • Author(s): Koichiro Yaji, Anton Visikovskiy, Takushi Iimori, Kenta Kuroda, Shingo Hayashi, Takashi. Kajiwara, Satoru Tanaka, Fumio. Komori, Shik Shin
  • Organizer: The 17th International Conference on the Formation of Semiconductor Interfaces
  • Int'l Joint Research
• [Presentation] Spin-polarized surface states of a Sn atomic layer at graphene/SiC(0001) interface (2019)
  • Author(s): Koichiro Yaji, Anton Visikovskiy, Takushi Iimori, Kenta Kuroda, Shingo Hayashi, Takashi. Kajiwara, Satoru Tanaka, Fumio. Komori, Shik Shin
  • Organizer: 21st International Vacuum Congress
  • Int'l Joint Research
• [Presentation] スピン分解光電子分光 3.0 (2019)
  • Author(s): 矢治光一郎
  • Organizer: 日本放射光学会第11回若手研究会
  • Invited
• [Presentation] グラフェン/SiC(0001)界面のSn単原子層における異なる型のスピン分裂バンドの共存 (2019)
  • Author(s): 矢治光一郎，Anton Visikovskiy，飯盛拓嗣，林真吾，梶原隆司，黒田健太，田中悟，小森文夫，辛埴
  • Organizer: 日本物理学会 秋季大会
• [Presentation] Spin-resolved photoemission spectroscopy of spin-orbit coupled surface states (2019)
  • Author(s): Koichiro Yaji
  • Organizer: 19th International Conference on Solid Films and Surfaces
  • Int'l Joint Research / Invited
• [Presentation] グラフェン/Sn/SiC(0001)のスピン偏極バンドと対称性 (2019)
  • Author(s): 矢治光一郎，Anton Visikovskiy，飯盛拓嗣，林真吾，梶原隆司，黒田健太，田中悟，小森文夫，辛埴
  • Organizer: 表面真空学術講演大会
• [Presentation] Spin-polarized surface states of a Sn atomic layer at graphene/SiC(0001) interface, Internatioanl vacuum congress (2019)
  • Author(s): K. Yaji, A. Visikovskiy, T. Iimori, K. Kuroda, S. Hayashi, T. Kajiwara, S. Tanaka, F. Komori, S. Shin
  • Organizer: Internatioanl vacuum congress
  • Int'l Joint Research
• [Presentation] Spin-polarized band structure of a Sn atomic layer at graphene/SiC(0001) interface (2018)
  • Author(s): K. Yaji, A. Visikovskiy, T. Iimori, K. Kuroda, S. Hayashi, T. Kajiwara, S. Tanaka, F. Komori, S. Shin
  • Organizer: European conference on surface science
  • Int'l Joint Research
• [Presentation] Spin polarization of photoelectron emitted from spin-orbit coupled surface states investigated by laser-SARPES (2018)
  • Author(s): K. Yaji, K. Kuroda, F. Komori, Shik Shi
  • Organizer: International conference on electron spectroscopy and structure
  • Int'l Joint Research