Giant spin-splitting originating from the broken space inversion symmetry of surface nano-structures

2010 Fiscal Year Self-evaluation 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 Chiba University, 大学院・融合科学研究科, 准教授 (70261542)
• Project Period (FY): 2008 – 2012
• Keywords: 低次元物性 / スピン軌道相互作用 / スピン分裂電子バンド / 光電子分光 / 第一原理計算

Research Abstract

本研究は、非磁性固体表面やその上に形成した非磁性低次元ナノ構造体など、空間反転対称性の破れた系においてスピン軌道相互作用により生じるスピン偏極電子バンドに関する詳細な知見を得ることを目的としている。そのために、
(1)Si表面上にTl、Pb、Bi などの重元素を1ML以下吸着させて形成される一・二次元量子ナノ構造体の原子構造を明らかにし、
(2)新たに立ち上げた高角度分解能・高エネルギー分解能光電子分光装置とスピン・角度分解光電子分光装置を用いて実験的に得られるこれらナノ構造体のスピン偏極電子バンドの分散を

Research Products

• [Journal Article] Electronic structure of the thallium induced 2×1 reconstruction on Si(001) (2010)
  • Author(s): P.E.J.Eriksson, K.Sakamoto, R.I.G.Uhrberg
  • Journal Title: Phys.Rev.B 81 Pages: 205422-1-5
  • Peer Reviewed
• [Journal Article] Re-investigation of the Bi-Induced Si(111)-(√<3>×√<3>) surface by low-energy electron diffraction (2010)
  • Author(s): T.Kuzumaki, T.Shirasawa, S.Mizuno, N.Ueno, H.Tochihara, K.Sakamoto
  • Journal Title: Surf.Sci. 604 Pages: 1044-1048
  • Peer Reviewed
• [Journal Article] Peculiar Rashba Splitting Originating from the Two-Dimensional Symmetry of the Surface (2009)
  • Author(s): K.Sakamoto, H.Kakuta, K.Sugawara, K. Miyamoto, A.Kimura, T.Kuzumaki, N.Ueno, E.Annese, J.Fujii, A.Kodama, T.Shishidou, H.Namatame, M.Taniguchi, T.Sato, T.Takahashi, T. Oguchi
  • Journal Title: Phys.Rev.Lett. 103 Pages: 156801-1-4
  • Peer Reviewed
• [Journal Article] Abrupt Rotation of the Rashba spin to the direction perpendicular to the surface (2009)
  • Author(s): K.Sakamoto, T.Oda, A.Kimura, K.Miyamoto, M.Tsujikawa, A.Imai, N.Ueno, H.Namatame, M.Taniguchi, P.E.J.Eriksson, R.I.G.Uhrberg
  • Journal Title: Phys.Rev.Lett. 102 Pages: 096805-1-4
  • Peer Reviewed
• [Journal Article] Electronic structure of the Si(110)-(16×2) surface : High-resolution ARPES and STM investigation (2009)
  • Author(s): K.Sakamoto, M.Setvin, K.Mawatari, P.E.J.Eriksson, K.Miki, R.I.G.Uhrberg
  • Journal Title: Phys.Rev.B 79 Pages: 045304-1-6
  • Peer Reviewed
• [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年度日本表面科学会放射光表面科学部会シンポジウム
  • Place of Presentation: 東工大
  • Year and Date: 2010-12-10
• [Presentation] Peculiar Rashba spins on heavy elements adsorbed silicon surfaces (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: 18^<th> International Vacuum Congress
  • Place of Presentation: Beijing, China
  • Year and Date: 2010-08-25
• [Presentation] Peculiar Rashba spins caused by the two-dimensional symmetry of the surface (2010)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 14^<th> Hiroshima International Symposium on Synchrotron Radiation
  • Place of Presentation: 広島大学
  • Year and Date: 2010-03-05
• [Presentation] Abrupt rotation of the Rashba spin (2009)
  • Author(s): Kazuyuki Sakamoto
  • Organizer: The 26^<th> European Conference on Surface Science
  • Place of Presentation: Parma, Italy
  • Year and Date: 2009-09-03
• [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: 立教学院池袋キャンパス
  • Year and Date: 2009-03-30