Giant Rashba splitting originating from the broken symmetry at surfaces

2012 Fiscal Year Final Research Report

• Project/Area Number: 20244045
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Chiba University
• Principal Investigator: SAKAMOTO Kazuyuki 千葉大学, 大学院・融合科学研究科, 准教授 (70261542)
• Co-Investigator(Kenkyū-buntansha): ODA Tatsuki 金沢大学, 大学院・数物科学系, 教授 (30272941) ; KIMURA Akio 広島大学, 大学院・理学研究科, 准教授 (00272534)
• Co-Investigator(Renkei-kenkyūsha): KIMURA Akio 広島大学, 大学院・理学研究科, 准教授 (00272534)
• Research Collaborator: R.I.G. Uhrberg Linkoping大学, 物理学科, 教授 ; M. Donath Munster大学, 物理学科, 教授
• Project Period (FY): 2008 – 2012
• Keywords: 表面・界面物性 / 電子物性 / スピン軌道相互作用 / 光電子分光 / スピンエレクトロニクス

Research Abstract

Peculiar Rashba effects, such as giant spin splitting, on low-dimensional nano-structures, which are formed on semiconductor surfaces, have been investigated both experimentally and theoretically. We observed extraordinary Rashba effects like Rashba spin that is 100 % spin polarized and points along the surface normal direction, and Rashba splitting at a point without time-reversal symmetry, which was believed to be a necessary condition for this effect. These extraordinary effects are concluded to result from the symmetry of the surface. We also showed that the sign of the Rashba splitting is determined by the particular charge asymmetry near the atomic cores.

Research Products

• [Journal Article] Highly Ordered Cobalt-Phthalocyanine Chains on Fractional Atomic Steps: One-Dimensionality and Electron Hybridization (2013)
  • Author(s): Yusuke Tanaka, Puneet Mishra, Ryusei Tateishi, Nguyen Thanh Cuong, Hideo Orita, Minoru Otani, Tomonobu Nakayama, Takashi Uchihashi, and Kazuyuki Sakamoto
  • Journal Title: ACS Nano Volume: 7 Pages: 1317-1323
  • DOI: DOI:10.1021/nn304898c
  • Peer Reviewed
• [Journal Article] Single Dirac cone on the Cs-covered topological insulator surface Sb2Te3(0001) (2012)
  • Author(s): Christian Junger, Chul-Hee Min, Hendrik Bentmann, Kazuyuki Sakamoto, and Friedrich Reinert
  • Journal Title: Physical Review Volume: B86 Pages: 161105(R)-1-5
  • DOI: DOI:10.1103/PhysRevB.86.161105
  • Peer Reviewed
• [Journal Article] Spin orientation and sign of the Rashba splitting in Bi/Cu(111) (2011)
  • Author(s): Hendrik Bentmann, Takuya Kuzumaki, Gustav Bihlmayer, Stefan Blugel, Eugene V. Chulkov, Friedrich Reinert, and Kazuyuki Sakamoto
  • Journal Title: Physical Review Volume: B84 Pages: 115426
  • DOI: DOI:10.1103/PhysRevB.84.115426
  • Peer Reviewed
• [Journal Article] Re-investigation of the Bi-InducedSi(111)-(√<3>×√<3>) surface bylow-energy electron diffraction (2010)
  • Author(s): Takuya Kuzumaki, Tetsuroh Shirasawa, Seigi Mizuno, Nobuo Ueno, HiroshiTochihara, and Kazuyuki Sakamoto
  • Journal Title: Surf. Sci. Volume: 604 Pages: 1044-1048
  • DOI: DOI:10.1016/j.susc.2010.03.022
  • Peer Reviewed
• [Journal Article] Electronic structure of the thallium induced 2×1 reconstruction on Si(001) (2010)
  • Author(s): P.E.J. Eriksson, Kazuyuki Sakamoto,and R.I.G. Uhrberg
  • Journal Title: Physical Review Volume: B81 Pages: 205422-1-5
  • DOI: DOI:10.1103/PhysRevB.81.205422
  • Peer Reviewed
• [Journal Article] Atomic and electronic structures of the ordered 2√<3>×2√<3> and molten 1×1 phase on the Si(111):Sn surface (2010)
  • Author(s): P.E.J. Eriksson, J.R. Osiecki, Kazuyuki Sakamoto, and R.I.G. Uhrberg
  • Journal Title: Physical Review Volume: B81 Pages: 235410-1-9
  • DOI: DOI:10.1103/PhysRevB.81.235410
  • Peer Reviewed
• [Journal Article] Intermolecular band dispersion in a self-assembled phthalocyanine derivative film:The case of tetrakis(thiadiazole)porhyrazine (2010)
  • Author(s): Yusuke Tanaka, Kouji Takahashi, Takuya Kuzumaki, Yuta Yamamoto, Kunihiro Hotta, Ayumi Harasawa, Yasuhito Miyoshi, Hirofumi Yoshikawa, Yukio Ouchi, Nobuo Ueno, Kazuhiko Seki, Kunio Awaga, Kazuyuki Sakamoto
  • Journal Title: Phys.Rev Volume: B82 Pages: 073408
  • DOI: DOI:10.1103/PhysRevB.82.073408
  • Peer Reviewed
• [Journal Article] Peculiar Rashba splitting originating from the two-dimensional symmetry of the surface (2009)
  • Journal Title: Phys. Rev. Lett. Volume: 103 Pages: 156801
  • DOI: DOI:10.1103/PhysRevLett.103.156801
  • Peer Reviewed
• [Journal Article] Abrupt Rotation of the Rashba Spin to the Direction Perpendicular to the Surface (2009)
  • Author(s): Kazuyuki Sakamoto, Tatsuki Oda, Akio Kimura, Koji Miyamoto, Masahito Tsujikawa, Ayako Imai, Nobuo Ueno,Hirofumi Namatame, Masaki Taniguchi, P.E.J. Eriksson, and R.I.G. Uhrberg
  • Journal Title: Phys. Rev. Lett. Volume: 102 Pages: 096805
  • DOI: DOI:10.1103/PhysRevLett.102.096805
  • Peer Reviewed
• [Journal Article] Electronic structure of the Si(110)-(16×2) surface: High-resolution ARPES and STM investigation (2009)
  • Author(s): Kazuyuki Sakamoto, Martin Setvin, Kenji Mawatari, P.E.J. Eriksson, Kazushi Miki, and R.I.G. Uhrberg
  • Journal Title: Phys. Rev. Volume: B79 Pages: 045304
  • DOI: DOI:10.1103/PhysRevB.79.045304
  • Peer Reviewed
• [Journal Article] High-temperature annealing and surface photovoltage shifts on Si(111)7×7H (2008)
  • Author(s): anmin Zhang, Kazuyuki Sakamoto, G.V. Hansson, and R.I.G. Uhberg
  • Journal Title: Phys. Rev. Volume: B78 Pages: 035318
  • DOI: DOI:10.1103/PhysRevB.79.045304
  • Peer Reviewed
• [Presentation] Rashba spins with peculiar scattering processes (2012)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: International Workshop on "Correlated Electrons at Surfaces and Interfaces"
  • Place of Presentation: Residence Wurzburg, Germany
  • Year and Date: 2012-10-02
• [Presentation] Rashba spins with peculiar scattering processes (2012)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: MAX-lab 25th Annual User Meeting
  • Place of Presentation: Medicon Village, Lund, Sweden(招待 講演)
  • Year and Date: 2012-09-24
• [Presentation] Rashba spins with peculiar scattering processes (2012)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 29^<th> European Conference on SurfaceScience
  • Place of Presentation: Edinburgh International ConferenceCentre, England
  • Year and Date: 2012-09-03
• [Presentation] Nontrivial Rashba spins on semiconductor surfaces (2012)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: Symposium on Surface and Nano Science2012
  • Place of Presentation: 雫石プリンスホテル(岩手県)(招待講 演)
  • Year and Date: 2012-01-11
• [Presentation] Quantum well states induced bycobalt-phthalocyanine adsorption on a quasi-one dimensional Ag surface (2011)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 11^<th> International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures
  • Place of Presentation: Sokos Hotel, St. Petersburg, Russia
  • Year and Date: 2011-10-06
• [Presentation] Quantum Well States Induced byCobalt-Phthalocyanine Adsorption on a Quasi-One Dimensional Surface (2011)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 28^<th> European Conference on SurfaceScience
  • Place of Presentation: University of Wrocla, Poland
  • Year and Date: 2011-08-30
• [Presentation] Quantum Well States Induced byCobalt-Phthalocyanine Adsorption on a Quasi-One Dimensional Surface (2011)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 13^<th> International Conference on theFormation of Semiconductor Interfaces
  • Place of Presentation: Faculty of Civil Engineering, the Czech Republic
  • Year and Date: 2011-07-07
• [Presentation] Intra- and Inter-Molecular Electronic States of Organic Thin films (2011)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: the International Conference onMaterials for Advanced Technologies2011
  • Place of Presentation: Suntec, Singapore(招待講演)
  • Year and Date: 2011-06-28
• [Presentation] Electronic states of self-assembledp-conjugated organic ultra-thin films (2011)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 29^<th> International Brand RitchieWorkshop
  • Place of Presentation: くにびきメッセ(松江市) (招待講演)
  • Year and Date: 2011-05-13
• [Presentation] 対称性に起因する特異なRashba効果 (2010)
  • Author(s): 坂本一之
  • Organizer: 平成22年度放射光表面科学部会・顕微ナノ材料科学研究会合同シンポジウム
  • Place of Presentation: 東京工業大学(東京都)(招待講演)
  • Year and Date: 2010-12-10
• [Presentation] Peculiar Rashba spins caused by the two-dimensional symmetry of the surface (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 15th International Conference onSolid Films and Surfaces
  • Place of Presentation: Beijing, China (招待講演)
  • Year and Date: 2010-10-09
• [Presentation] Peculiar Rashba spins on heavy elements adsorbed silicon surfaces (2010)
  • Author(s): Kazuyuki Sakamoto, Akio Kimura, Tatsuki Oda, Koji Miyamoto, Takuya Kuzumaki, Takashi Takahashi, Jun Fujii, Tamio Oguchi, and R.I.G. Uhrberg
  • Organizer: 18th International Vacuum Congress
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-08-25
• [Presentation] Intermolecular band dispersion of a self-assembled tetrakis(thiadiazole)porhyrazine film (2010)
  • Author(s): Yusuke Tanaka, Kouji Takahashi, Takuya Kuzumaki, Yuta Yamamoto, Kuniharu Hotta, Ayumi Harasawa, Hirofumi Yoshikawa, Yuichi Ouchi, Nobuo Ueno, Kazuhiko Seki, Kunio Awaga, and Kazuyuki Sakamoto
  • Organizer: 18th International Vacuum Congress
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-08-24
• [Presentation] Rashba spins on heavy elements adsorbed silicon surfaces (2010)
  • Author(s): Kazuyuki Sakamoto, Akio Kimura,Tatsuki Oda, Koji Miyamoto, Takuya Kuzumaki, Takashi Takahashi, Jun Fujii, Tamio Oguchi, and R.I.G. Uhrberg
  • Organizer: 37th International Conference onVacuum UltraViolet and X-ray Physics
  • Place of Presentation: Vancouver, Canada
  • Year and Date: 2010-07-12
• [Presentation] Peculiar Rashba spins caused by the two-dimensional symmetry of the surface (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 14^<th> Hiroshima InternationalSymposium on Synchrotron Radiation
  • Place of Presentation: 広島大学(広島県)(招待講演)
  • Year and Date: 2010-03-05
• [Presentation] Peculiar Rashba spins originating from the two-dimensional symmetry ofthe surface (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: Symposium on Surface and Nano Science2010
  • Place of Presentation: 雫石プリンスホテル(岩手県)(招待講 演)
  • Year and Date: 2010-01-17
• [Presentation] Peculiar Rashba spins originating from the two-dimensional symmetry of the surface (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 449. Wilhelm and Else Heraeus Seminar: "Rashba and related spin-orbit effects in metals"
  • Place of Presentation: Bad Honnef, Germany
  • Year and Date: 2010-01-07
• [Presentation] Abrupt change in the direction of theRashba spin (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: IUPAC 5^<th> International Symposium onNovel Materials and Synthesis (NMS-V)
  • Place of Presentation: Shanghai, China
  • Year and Date: 2009-10-21
• [Presentation] Abrupt Rotation of the Rashba Spin to the Direction Perpendicular to the Surface (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 11^<th> International Conference on Electronic Spectroscopy and Structure (ICESS-11)
  • Place of Presentation: 奈良県新公会堂(奈良県)
  • Year and Date: 2009-10-10
• [Presentation] High-resolution Photoemission study of organic monolayer films Surface (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 5^<th> Workshop on Advanced Spectroscopy of Organic Materials for Electronic Applications (ASOMEA V)
  • Place of Presentation: Uppsala, Sweden
  • Year and Date: 2009-09-30
• [Presentation] Abrupt rotation of the Rashba spin (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 26^<th> European Conference on SurfaceScience (ECOSS26)
  • Place of Presentation: Parma, Italy
  • Year and Date: 2009-09-03
• [Presentation] Abrupt upstanding of the Rashba spin (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: International Workshop on Strong Correlations and Angle-Resolved Photoemission Spectroscopy(CORPES09)
  • Place of Presentation: Zurich, Switzerland
  • Year and Date: 2009-07-21
• [Presentation] Si(110)-(16×2)表面の電子状態 坂本一之 (2009)
  • Author(s): M. Setvin, 馬渡健児, P.E.J. Eriksson, 三木一司, R.I.G. Uhrberg
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 立教大学(東京都)
  • Year and Date: 2009-03-30
• [Presentation] Tl/Si(111)-1×1表面電子構造とC3対称性スピン分裂 (2009)
  • Author(s): 小田竜樹
  • Organizer: 日本物理学会第64回年次大会
  • Place of Presentation: 日立教大学(東京都)
  • Year and Date: 2009-03-30
• [Presentation] 重元素吸着半導体表面のRashba効果 (2008)
  • Author(s): 坂本一之
  • Organizer: PF研究会 "高分解能角度分解光電子分 光研究と将来展望"
  • Place of Presentation: 高エネルギー加速器研究機構(茨城県)
  • Year and Date: 2008-12-18