Development of a spin-polarized probe for nanoscale transport measurements and its application to spin transport of surface Rashba systems

2012 Fiscal Year Final Research Report

• Project/Area Number: 22656011
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: The University of Tokyo
• Principal Investigator: HIRAHARA Toru 東京大学, 大学院・理学系研究科, 助教 (30451818)
• Co-Investigator(Renkei-kenkyūsha): HASEGAWA Shuji 東京大学, 大学院・理学系研究科, 教授 (00228446)
• Project Period (FY): 2010 – 2012
• Keywords: 表面

Research Abstract

In the present research, we have tried to extend our nanoscale transport measurement technique to spin transport. First, we developed a method to make a magnetic probe by coating CoFe on cabon nanotube (CNT) tips. Using these magnetic probes in our four-tip scanning tunneling microscope, we succeeded in detecting some spin signal, which is likely originated from the current-induced spin-polarization phenomenon in surface states of ultrathin bismuth films.

Research Products

• [Journal Article] Atomic and Electronic Structure of Ultrathin Bi(111) Films Grown on Bi2Te3(111) Substrates: Evidence for a Strain-Induced Topological Phase Transition (2012)
  • Author(s): T. Hirahara, N. Fukui, T. Shirasawa, M. Yamada, M. Aitani, H. Miyazaki, M. Matsunami, S. Kimura, T. Takahashi, S. Hasegawa, and K. Kobayashi
  • Journal Title: Phys. Rev. Lett. Volume: 109 Pages: 227401
  • DOI: DOI:10.1103/PhysRevLett.109.227401
  • Peer Reviewed
• [Journal Article] Surface Relaxation of Topological Insulators: Influence on the Electronic Structure (2012)
  • Author(s): N. Fukui, T. Hirahara, T. Shirasawa, T. Takahashi, K. Kobayashi, and S. Hasegawa
  • Journal Title: Phys. Rev. B Volume: 85 Pages: 115426
  • DOI: DOI:10.1103/PhysRevB.85.115426
  • Peer Reviewed
• [Journal Article] Anisotropic conductivity of the Si(111)4×1-In surface: Transport mechanism determined by the temperature dependence (2011)
  • Author(s): T. Uetake, T. Hirahara, Y. Ueda, N. Nagamura, R. Hobara, and S. Hasegawa
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 035325
  • DOI: DOI:10.1103/PhysRevB.86.035325
  • Peer Reviewed
• [Journal Article] Interfacing 2D and 3D topological insulators: Bi(111) bilayer on Bi2Te3 (2011)
  • Author(s): T. Hirahara, G. Bihlmayer, Y. Sakamoto, M. Yamada, H. Miyazaki, S. Kimura, S. Bl¨ugel, and S. Hasegawa
  • Journal Title: Phys. Rev. Lett. Volume: 107 Pages: 166801
  • DOI: DOI:10.1103/PhysRevLett.107.166801
  • Peer Reviewed
• [Journal Article] Magnetic anisotropy of Co ultrathin films (2011)
  • Author(s): Y. Saisyu, T. Hirahara, R. Hobara, and S. Hasegawa
  • Journal Title: Journal of Applied Physics Volume: 110 Pages: 053902
  • DOI: DOI:10.1063/1.3624662
  • Peer Reviewed
• [Journal Article] Spectroscopic evidence of a topological quantum phase transition in ultrathin Bi2Se3 films (2011)
  • Author(s): Y. Sakamoto, T. Hirahara, H. Miyazaki, S. Kimura, and S. Hasegawa
  • Journal Title: Phys. Rev. B Volume: 81 Pages: 165432
  • DOI: DOI:10.1103/PhysRevB.81.165432
  • Peer Reviewed
• [Journal Article] Anomalous transport in an n-type topological insulator ultrathin Bi2Se3 film (2011)
  • Author(s): T. Hirahara, Y. Sakamoto, Y. Takeichi, H. Miyazaki, S. Kimura, I. Matsuda, A. Kakizaki, S. Hasegawa
  • Journal Title: Phys. Rev. B Volume: 82 Pages: 155309
  • DOI: DOI:10.1103/PhysRevB.82.155309
  • Peer Reviewed
• [Journal Article] A topological metal at the surface of an ultrathin Bi1-xSbx alloy film (2010)
  • Author(s): T. Uetake, T. Hirahara, Y. Ueda, N.Nagamura, 6. T .Hirahara, Y. Sakamoto, Y. Saisyu, H. Miyazaki, S. Kimura, T. Okuda, I. Matsuda, S. Murakami, and S. Hasegawa
  • Journal Title: Phys. Rev. B Volume: 81 Pages: 165422
  • DOI: DOI:10.1103/PhysRevB.81.165422
  • Peer Reviewed
• [Presentation] ビスマス超薄膜の超高真空・低温・強磁場中における電気伝導測定 (2013)
  • Author(s): 相谷昌紀, 平原徹,長谷川修司
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学, 東広島
  • Year and Date: 2013-03-26
• [Presentation] 放射光で拓く表面物質科学の新展開 (2013)
  • Author(s): 平 原徹
  • Organizer: 所長招聘研究会「2020年の光分子科学を語る」
  • Place of Presentation: 分子科学研究所招待講演.
  • Year and Date: 2013-01-23
• [Presentation] Comprehensive study oftopological phase transitions using ultrathin films (2013)
  • Author(s): T. Hirahara
  • Organizer: Energy Materials Nanotechnology (EMN) West Meeting
  • Place of Presentation: Houston, USA招待講演.
  • Year and Date: 2013-01-07
• [Presentation] Bi2Te3上のBi超薄膜の電子状態と表面構造解析 (2012)
  • Author(s): 平原徹、福居直哉、白澤徹郎、山田学、相谷昌紀、宮崎秀俊、松波雅治、木村真一、高橋敏男、小林功佳、長谷川修司
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-0327
• [Presentation] Pbドープによるトポロジカル絶縁体Bi2Te3超薄膜の電子状態制御と電気伝導度 (2012)
  • Author(s): 相谷昌紀, 平原徹, 坂本裕介, 山田学, 宮崎秀俊, 松波雅治, 木村真一, 長谷川修司
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-0327
• [Presentation] Bi2Te3超薄膜および1BLBiのLEED-IV構造解析 (2012)
  • Author(s): 福居直哉, 平原徹, 白澤徹郎, 高橋敏男, 小林功佳, 長谷川修司
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 20120324-0327
• [Presentation] Bi超薄膜の低温・磁場中での表面電気伝導測定 (2012)
  • Author(s): 相谷昌紀、 平 原 徹、長 谷 川 修 司
  • Organizer: 第32回表面科学学術講演会
  • Place of Presentation: 東北大学
  • Year and Date: 2012-11-21
• [Presentation] 集束イオンビームによるその場表面微細加工と電気伝導測定 (2012)
  • Author(s): 福居直哉、平原徹、長谷川修司
  • Organizer: 第32回表面科学学術講演会
  • Place of Presentation: 東北大学
  • Year and Date: 2012-11-20
• [Presentation] 集束イオンビームによる in situ 微細加工を 施した表面の電位伝導特性 (2012)
  • Author(s): 福居直哉、平原徹、長谷川修司
  • Organizer: 日本物理学会 2012 年秋季大会
  • Place of Presentation: 横浜国立大学
  • Year and Date: 2012-09-18
• [Presentation] ビスマスおよびビスマス系化合物超薄膜の実験的研究 (2012)
  • Author(s): 平原徹
  • Organizer: 科研費基盤研究A「固体中のディラック電子」第1回研究会
  • Place of Presentation: 東京大本郷招待講演.
  • Year and Date: 2012-07-25
• [Presentation] Charge and Spin Transport at Nonmagnetic Surfaces (2012)
  • Author(s): T. Hirahara
  • Organizer: International Conference of Young Researchers on Advanced Materials (ICYRAM)
  • Place of Presentation: Singapore, Singapore招待講演
  • Year and Date: 2012-07-03
• [Presentation] 非磁性体超薄膜のスピン偏極表面電子状態 (2012)
  • Author(s): 平 原徹
  • Organizer: UVSORIIIにおける低エネルギー光電子分光の新展開
  • Place of Presentation: 分子科学研究所招待講演
  • Year and Date: 2012-06-21
• [Presentation] Interfacing 2D and 3D topological insulatorsBi(111) bilayer on Bi2Te3 (2012)
  • Author(s): T. Hirahara, G. Bihlmayer, Y. Sakamoto, M. Yamada, H. Miyazaki, S. Kimura, S. Bluegel, and S. Hasegawa
  • Organizer: APS March meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 2012-02-28
• [Presentation] トポロジカル絶縁体超薄膜の電 子状態と輸送特性 (2012)
  • Author(s): 平 原徹
  • Organizer: 東京大学物性研究 所短期研究会「トポロジカル絶縁体の表 面電子状態」
  • Place of Presentation: 東大物性研
  • Year and Date: 2012-02-24
• [Presentation] Ultrathin films of topological insulators (2012)
  • Author(s): T. Hirahara
  • Organizer: The first SRC Winter Workshop on TopologicalMatter
  • Place of Presentation: PhoenixPark, Korea招待講演.
  • Year and Date: 2012-01-30
• [Presentation] Ultrathin films of topological insulators, Symposium on Surface and Nano Science (2012)
  • Author(s): T. Hirahara
  • Organizer: (SSNS) 2012
  • Place of Presentation: Shizukuishi, Japan
  • Year and Date: 2012-01-11
• [Presentation] In situ measurements of current induced spin polarization in ultrathin bismuth films (2011)
  • Author(s): T. Tono, T. Hirahara, and S. Hasegawa
  • Organizer: The 6th International Symposium on Surface Science (ISSS-6)
  • Place of Presentation: Funaobori, Tokyo
  • Year and Date: 20111211-1215
• [Presentation] 「ビスマス超薄膜の表面状態における電流誘起スピン偏極の測定」 (2011)
  • Author(s): 東野剛之, 平原徹, 長谷川修司
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 20110923-0926
• [Presentation] 三次元トポロジカル絶縁体上への二次元量子スピンホール相単一Biバイレイヤーの成長 (2011)
  • Author(s): 平原徹, G. Bihlamayer, 坂本裕介, 山田学, 宮崎秀俊, 木村真一, S. Bluegel, 長谷川修司
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 20110923-0926
• [Presentation] トポロジカル絶縁体超薄膜の電子状態と輸送特性 (2011)
  • Author(s): 平原徹
  • Organizer: 第31回表面科学学術講演会
  • Place of Presentation: 船堀東京招待講演.
  • Year and Date: 2011-12-16
• [Presentation] トポロジカル絶縁体超薄膜の電子状態と輸送特性 (2011)
  • Author(s): 平原徹
  • Organizer: UVSORユーザーミーティング
  • Place of Presentation: 岡崎コンファレンスセンター招待講演.
  • Year and Date: 2011-11-18
• [Presentation] Ultrathin films of topological insulators (2011)
  • Author(s): T. Hirahara
  • Organizer: The 15th International Conference on Thin Films
  • Place of Presentation: Kyoto, Japan招待講演.
  • Year and Date: 2011-10-08
• [Presentation] ラシュバ・トポロジカル表面系の輸送特性 (2011)
  • Author(s): 平原徹
  • Organizer: 日本物理学会2011年秋季大会シンポジウム「多彩な表面系における電子輸送現象」
  • Place of Presentation: 富山大学招待講演
  • Year and Date: 2011-09-24
• [Presentation] 非磁性体表面の磁性現象 (2011)
  • Author(s): 平原徹
  • Organizer: 物性若手夏の学校分科会
  • Place of Presentation: ホテルエバー富士招待講演.
  • Year and Date: 2011-08-03
• [Presentation] In situ measurements of current induced spin polarization in ultrathin bismuth films (2011)
  • Author(s): T. Tono, T. Hirahara, and S. Hasegawa
  • Organizer: The 13th International Conference on the Formation of Semiconductor Interfaces(ICFSI-13)
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2011-07-04
• [Presentation] Ultrathin Films of Topological Insulators (2011)
  • Author(s): T. Hirahara, Y. Sakamoto, M. Yamada, H. Miyazaki, Y. Takeichi, S. Kimura, I. Matsuda, A. Kakaizaki, S. Hasegawa
  • Organizer: The 13th International Conference on the Formation of Semiconductor Interfaces (ICFSI13)
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 2011-07-04
• [Presentation] ビスマス超薄膜におけるスピンホール効果のin situ測定. (2010)
  • Author(s): 東野剛之,平原徹,長谷川修司
  • Organizer: 日本物理学会2010秋季大会
  • Place of Presentation: 大阪府立大
  • Year and Date: 20100923-0926
• [Presentation] In situ detection of the spin Hall effect in ultrathin bismuth films (2010)
  • Author(s): T. Tono, T. Hirahara, S. Hasegawa
  • Organizer: International vacuum congress (IVC-18)
  • Place of Presentation: 北京
  • Year and Date: 20100723-0727
• [Presentation] In situ detection of the spin Hall effect in ultrathin bismuth films (2010)
  • Author(s): T. Tono, T. Hirahara, S. Hasegawa
  • Organizer: SSSJ-A3 Foresight Joint Symposium on Nanomaterials and Nanostructures
  • Place of Presentation: 東京大学
  • Year and Date: 20100705-0707
• [Presentation] ビスマス超薄膜の表面状態における電流誘起スピン偏極の測定 (2010)
  • Author(s): 東野剛之, 平原徹, 長谷川修司
  • Organizer: 表面科学学術講演会
  • Place of Presentation: 船堀,東京
  • Year and Date: 2010-12-16
• [Presentation] Bi 表面上でのスピン偏極電流の検出 (2010)
  • Author(s): 東野剛之,坂本裕介, 平原徹,長谷川修司
  • Organizer: 平成22年度東北大学電気通信研究所プロジェクト研究会
  • Place of Presentation: 仙台
  • Year and Date: 2010-11-17
• [Presentation] ビスマス超薄膜におけるスピンホール効果の測定 (2010)
  • Author(s): 東野剛之, 平原徹, 長谷川修司
  • Organizer: 物性科学領域横断研究会
  • Place of Presentation: 東京
  • Year and Date: 2010-11-13
• [Presentation] ビスマス量子薄膜における表面状態による電気伝導 (2010)
  • Author(s): 平原徹
  • Organizer: 第30回表面科学学術講演会奨励賞受賞記念講演
  • Place of Presentation: 大阪大学招待講演.
  • Year and Date: 2010-11-05