Study of spin-polarized one-dementional dedge state using by using independently-driven four-tip STM

• Project/Area Number: 15K17464
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: The University of Tokyo
• Principal Investigator: Takayama Akari 東京大学, 大学院理学系研究科(理学部), 助教 (70722338)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2015: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
• Keywords: スピン物性 / Rashba効果 / トポロジカル絶縁体 / 輸送特性 / 磁性 / 2次元超伝導

Outline of Final Research Achievements

We have found the transport property of topological insulator and surface superstructure with Rashba effect, which have spin-polarized band on surface or edge. We have investigated the transport properties on step edge for topological insulators Bi2Se3 and Bi2Te3 thin films on the Si(111) substrate by using the in-situ 4PP electrical conductivity measurement. We have also clarified various physical properties of MnBi2Se4/Bi2Se3, which is heterojunction between magnetic insulator and topological insulator. In addition, we have demonstrated the superconductivity of (Tl, Pb)/Si(111) and (Tl, Pb)/Ge(111) which show the giant Rashba effect by using 4PP resistivity measurement and STM/STS.

Research Products

• [Journal Article] Anisotropic electronic band structure of intrinsic Si(110) studied by angle-resolved photoemission spectroscopy and first-principles calculations (2017)
  • Author(s): Matsushita Stephane Yu、Takayama Akari、Kawamoto Erina、Hu Chunping、Hagiwara Satoshi、Watanabe Kazuyuki、Takahashi Takashi、Suto Shozo
  • Journal Title: Physical Review B Volume: 96 Issue: 12 Pages: 125302-125302
  • DOI: 10.1103/physrevb.96.125302
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Emergence of charge density waves and a pseudogap in single-layer TiTe2 (2017)
  • Author(s): P. Chen, Woei Wu Pai, Y.-H. Chan, A. Takayama, C.-Z. Xu, A. Karn, S. Hasegawa, M. Y. Chou, S.-K. Mo, A.-V. Fedorov, and T.-C. Chiang
  • Journal Title: Nature Communications Volume: 8 Issue: 1 Pages: 516-516
  • DOI: 10.1038/s41467-017-00641-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Large-Gap Magnetic Topological Heterostructure Formed by Subsurface Incorporation of a Ferromagnetic Layer (2017)
  • Author(s): T. Hirahara, S. V. Eremeev, T. Shirasawa, Y. Okuyama, T. Kubo, R. Nakanishi, R. Akiyama, A. Takayama, T. Hajiri, S. Ideta, M. Matsunami, K. Sumida, K. Miyamoto, Y. Takagi, K. Tanaka, T. Okuda, T. Yokoyama, S. Kimura, S. Hasegawa, E. V. Chulkov
  • Journal Title: NANO Letters Volume: 17 Issue: 6 Pages: 3493-3500
  • DOI: 10.1021/acs.nanolett.7b00560
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Two-Dimensional Superconductivity in Intercalated Bilayer Graphene (2017)
  • Author(s): 高橋隆, 菅原克明, 一ノ倉聖, 高山あかり, 長谷川修司
  • Journal Title: Hyomen Kagaku Volume: 38 Issue: 9 Pages: 460-465
  • DOI: 10.1380/jsssj.38.460
  • NAID: 130006083394
  • ISSN: 0388-5321, 1881-4743
  • Peer Reviewed
• [Journal Article] Proving Nontrivial Topology of Pure Bismuth by Quantum Confinement (2016)
  • Author(s): S. Ito, B. Feng, M. Arita, A. Takayama, R.-Y. Liu, T. Someya, W.-C. Chen, T. Iimori, H. Namatame, M. Taniguchi, C.-M. Cheng, S.-J. Tang, F. Komori, K. Kobayashi, T.-C. Chiang, and I. Matsuda
  • Journal Title: Physical Review Letters Volume: 117 Issue: 23 Pages: 236402-236402
  • DOI: 10.1103/physrevlett.117.236402
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Superconducting Calcium-Intercalated Bilayer Graphene (2016)
  • Author(s): Satoru Ichinokura, Katsuaki Sugawara, Akari Takayama, Takashi Takahashi, and Shuji Hasegawa
  • Journal Title: ACS Nano Volume: 10 Issue: 2 Pages: 2761-2765
  • DOI: 10.1021/acsnano.5b07848
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Two-Dimensional Superconductor with a Giant Rashba Effect: One-Atom-Layer Tl-Pb Compound on Si(111) (2015)
  • Author(s): A. V. Matetskiy, S. Ichinokura, L. V. Bondarenko, A. Y. Tupchaya, D. V. Gruznev, A. V. Zotov, A. A. Saranin, R. Hobara, A. Takayama, and S. Hasegawa
  • Journal Title: Physical Review Letters Volume: 115 Issue: 14 Pages: 147003-147003
  • DOI: 10.1103/physrevlett.115.147003
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Edge State of Bi Thin Film Studied by Spin-Resolved ARPES (2015)
  • Author(s): 高山あかり, 佐藤宇史, 相馬清吾, 小口多美夫, 高橋隆
  • Journal Title: Hyomen Kagaku Volume: 36 Issue: 8 Pages: 412-417
  • DOI: 10.1380/jsssj.36.412
  • NAID: 130005093813
  • ISSN: 0388-5321, 1881-4743
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Rashba effect of bismuth thin film on silicon studied by spin-resolved ARPES (2015)
  • Author(s): A. Takayama, T. Sato, S. Souma, and T. Takahashi
  • Journal Title: Journal of Electron Spectroscopy and Related Phenomena Volume: 201 Pages: 105-109
  • DOI: 10.1016/j.elspec.2014.11.002
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Structural analysis of bilayer graphene on SiC substrate by total-reflection high-energy positron diffraction (2018)
  • Author(s): Y. Endo, Y. Fukaya, I. Mochizuki, A. Takayama, T. Hyodo and S. Hasegawa
  • Organizer: Symposium on Surface and Nano Science 2018
  • Int'l Joint Research
• [Presentation] STM・ARPESによる(Pb,Bi)/Si(111)の構造および電子状態 (2017)
  • Author(s): 高山あかり, 中村友謙, A. Y. Tupchaya, L. V. Bondarenko, D. V. Gruznev, A. V. Zotov, A. A. Saranin, 長谷川修司
  • Organizer: 日本物理学会2017年年次大会
  • Place of Presentation: 大阪大学, 大阪
  • Year and Date: 2017-03-17
• [Presentation] グラフェン/SiCの輸送特性：基板との相互作用の効果 (2017)
  • Author(s): 高山あかり、遠藤由大、金觀洙、朴君昊、遠藤則史、保原麗、吹留博一、末光眞希、長谷川修司
  • Organizer: 日本物理学会 (2017年秋季大会)
• [Presentation] Rashba系表面超構造の超伝導 (2017)
  • Author(s): 高山あかり、長谷川修司
  • Organizer: 日本表面科学会 2017年真空・表面科学合同講演会
  • Invited
• [Presentation] One-dimensional edge states with spin splitting in bismuth (2017)
  • Author(s): A. Takayama, T. Sato, S. Souma, T. Oguchi, T. Takahashi
  • Organizer: Nano-Micro Conference 2017
  • Int'l Joint Research / Invited
• [Presentation] TRHEPDを用いた2層グラフェン層間化合物C6LiC6の構造解析 (2017)
  • Author(s): 高山あかり
  • Organizer: 陽電子回折研究会
  • Place of Presentation: 高エネルギー加速器研究機構, つくば
• [Presentation] 走査トンネル分光測定による(Tl,Pb)/Si(111)表面超構造における超伝導の観測 (2016)
  • Author(s): 中村友謙, H. Kim, 一ノ倉聖, 高山あかり, 秋山了太, A. Z. Zotov, A. A. Saranin, 長谷川幸雄, 長谷川修司
  • Organizer: 物性研短期究会「走査トンネル顕微鏡による物性研究の現状と展望」
  • Place of Presentation: 東京大学物性研究所, 柏
  • Year and Date: 2016-10-31
• [Presentation] One-Dimensional Edge States with Giant Spin Splitting in a Bismuth Thin Film studied by spin-resolved ARPES (2016)
  • Author(s): A. Takayama
  • Organizer: Spintronics-EMN LasVegas Meetings
  • Place of Presentation: Las Vegas, USA
  • Year and Date: 2016-10-11
  • Int'l Joint Research / Invited
• [Presentation] Pb/Ge(111)超薄膜における電子構造および輸送特性の膜厚依存性 (2016)
  • Author(s): 高山あかり、遠藤由大、Fan Di、今村真幸、高橋和敏、長谷川修司
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学, 金沢
  • Year and Date: 2016-09-13
• [Presentation] Electronic properties of Pb/Ge(111) studied by ARPES and transport measurements (2016)
  • Author(s): A. Takayama, Y. Endo, D. Fan, M. Imamura, K. Takahashi, and S. Hasegawa
  • Organizer: The 20th I nternational Vacuum Congress (IVC-20)
  • Place of Presentation: Busan, Korea
  • Year and Date: 2016-08-22
  • Int'l Joint Research
• [Presentation] Sb薄膜におけるエッジ構造のスピン分解ARPES (2016)
  • Author(s): 高山あかり, 佐藤宇史, 相馬清吾, 小口多美夫, 高橋隆
  • Organizer: 日本物理学会第71回年次大会(2016年)
  • Place of Presentation: 東北学院大（宮城県・仙台市）
  • Year and Date: 2016-03-19
• [Presentation] 原子ステップをもつトポロジカル絶縁体のin situ輸送特性観測 (2016)
  • Author(s): 福居直哉, 保原麗, 高山あかり, 秋山了太, 長谷川修司
  • Organizer: 日本物理学会第71回年次大会(2016年)
  • Place of Presentation: 東北学院大（宮城県・仙台市）
  • Year and Date: 2016-03-19
• [Presentation] ４端子電気伝導測定によるMnX/Bi_2_X_3_(X=Se, Te)薄膜の輸送特性 (2015)
  • Author(s): 久保高幸、中西亮介、高山あかり、福居直哉、保原麗、秋山了太、長谷川修司
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学（大阪府・吹田市）
  • Year and Date: 2015-09-16
• [Presentation] Pb/Ge(111)超薄膜における構造と輸送特性 (2015)
  • Author(s): 相谷 昌紀, 一ノ倉 聖, 花塚 真大, 保原 麗, 高山 あかり, 秋山 了太, 長谷川 修司
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学（大阪府・吹田市）
  • Year and Date: 2015-09-16
• [Book] Modern Technologies for Creating the Thin-film Systems and Coatings (2017)
  • Author(s): A. Takayama
  • Total Pages: 442
  • Publisher: InTech
• [Remarks] プレスリリース「グラフェンの超伝導化に成功」
  • URL: http://www.s.u-tokyo.ac.jp/ja/press/2016/4597/