Properties of low-dimensional metals fabricated on solid surfaces

2011 Fiscal Year Final Research Report

• Project/Area Number: 21340083
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Kyoto University
• Principal Investigator: ARUGA Tetsuya 京都大学, 大学院・理学研究科, 教授 (70184299)
• Co-Investigator(Kenkyū-buntansha): OKUYAMA Hiroshi 京都大学, 大学院・理学研究科, 准教授 (60312253)
• Project Period (FY): 2009 – 2011
• Keywords: 表面・界面物性 / スピントロニクス / 超薄膜 / 低次元金属

Research Abstract

Low-dimensional metals fabricated on solid surfaces often exhibit peculiar properties due to electron-electron, electron-lattice, and Rashba-type spin-orbit interaction. In this research work, we have discovered various types of Rashba spin-polarized electronic states on low-dimensional metals on semiconductor surfaces, which will be the basis for coming spintronic technology. We also found that a metal-insulator phase transition in an indium monolayer on silicon surface undergoes via pseudo-first-order transition.

Research Products

• [Journal Article] Spin-polarized surface states on Br/Ge(111)-(1x1): Surface spin polarization without heavy elements (2012)
  • Author(s): Y. Ohtsubo, S Hatta, N Kawai, A Mori, Y Takeichi, K Yaji, H Okuyama, T. Aruga
  • Journal Title: Phys. Rev B Volume: 86 Pages: 165325(6)
  • DOI: DOI:10.1103/PhysRevB.86.16532
  • Peer Reviewed
• [Journal Article] Structural and electronic properties of the Pb/Ge(111)-β(√3×√3)R30° surface studied by photoelectron spectroscopy and first-principles calculations (2012)
  • Author(s): K. Yaji, S. Hatta, H. Okuyama, T. Aruga
  • Journal Title: Phys. Rev. B Volume: 86 Pages: 235317(6)
  • DOI: DOI:10.1103/PhysRevB.86.235317
  • Peer Reviewed
• [Journal Article] "A metallic surface state with uniaxial spin polarization on Tl/Ge(111)-(1× 1) (2012)
  • Author(s): Y Ohtsubo, S Hatta, H Okuyama, T Aruga
  • Journal Title: J. Phys.: Condens. Matter Volume: 24 Pages: 092001(5)
  • DOI: DOI:10.1088/0953-8984/24/9/092001
  • Peer Reviewed
• [Journal Article] "Dynamical fluctuations in In nanowires on Si (111)" (2011)
  • Author(s): ] S. Hatta, Y. Ohtsubo, T. Aruga, S.Miyamoto, H. Okuyama, H. Tajiri, O. Sakata
  • Journal Title: Phys. Rev. B Volume: 84 Pages: 245321(8)
  • DOI: DOI:10.1103/PhysRevB.84.245321
  • Peer Reviewed
• [Journal Article] Structure determination of Pb/Ge(111)β-(√3×√3)R30° by dynamical low-energy electron diffraction analysis and first-principles calculation (2011)
  • Author(s): Y. Ohtsubo, H. Muto, K. Yaji, S. Hatta, H. Okuyama, T. Aruga
  • Journal Title: Journal of Physics. Condens Volume: 23 Pages: 435001(6)
  • DOI: doi:10.1088/0953-8984/23/43/435001
  • Peer Reviewed
• [Journal Article] Spin-polarized semiconductor surface states localized in subsurface layers (2010)
  • Author(s): Y Ohtsubo, S Hatta, K Yaji, H Okuyama, K Miyamoto, T Okuda, A Kimura, H. Namatame, M. Taniguchi, T. Aruga
  • Journal Title: Physical Review B Volume: 82 Pages: 201307(4)
  • DOI: DOI:10.1103/PhysRevB.82.201307
  • Peer Reviewed
• [Journal Article] Large Rashba spin splitting of a metallic surface-state band on a semiconductor surface (2010)
  • Author(s): K Yaji, Y Ohtsubo, S Hatta, H Okuyama, K Miyamoto, T Okuda, A Kimura, H, Namatame, M. Taniguchi, T. Aruga
  • Journal Title: Nature commun Volume: 1 Pages: 17(5)
  • DOI: doi:10.1038/ncomms101
  • Peer Reviewed
• [Journal Article] Epitaxial growth of Bi films on Ge(111) (2009)
  • Author(s): S. Hatta, Y. Ohtsubo, S. Miyamoto, H. Okuyama, T. Aruga
  • Journal Title: Appl. Surf. Sci Volume: 256 Pages: 1252-1256
  • DOI: DOI:10.1016/j.apsusc.2009.05.079
  • Peer Reviewed
• [Journal Article] Large Rashba spin splitting of surface resonance bands on semiconductor surface (2009)
  • Author(s): S. Hatta, T. Aruga, Y. Ohtsubo and H.Okuyama
  • Journal Title: Phys. Rev. B Volume: 80 Pages: 11309(4)
  • DOI: DOI:10.1103/PhysRevB.80.113309
  • Peer Reviewed
• [Journal Article] Structure determination of Bi/Ge(111)-(√3×√3)R30°by dynamical low-energy electron diffraction analysis and scanning tunneling microscopy (2009)
  • Author(s): Y.Ohtsubo, S. Hatta, K. Yaji, H. Okuyama and T. Aruga
  • Journal Title: J. Phys.: Condens. Matter Volume: 21 Pages: 405001(6)
  • DOI: DOI:10.1088/0953-8984/21/40/405001
  • Peer Reviewed
• [Presentation] Spin-polarized metallic surface states induced by spin-orbit interaction on semiconductors without heavy elements (2012)
  • Author(s): Y. Ohtsubo, S. Hatta, K. Yaji, H. Okuyama, and T. Aruga
  • Organizer: 29th European Conference on Surface Science, Edinburgh
  • Year and Date: 20120903-07
• [Presentation] Spin-polarized electronic states at surfaces and interfaces of Ge (2012)
  • Author(s): T. Aruga
  • Organizer: The 10th Japan-Russia Seminar on Semiconductor Surfaces
  • Place of Presentation: 東京
  • Year and Date: 2012-09-16
• [Presentation] 重元素吸着Ge(111)表面のスピン偏極状態と電気伝導 (2012)
  • Author(s): 八田振一郎、有賀哲也
  • Organizer: 第4回放射光若手研究会
  • Place of Presentation: 東京
  • Year and Date: 2012-08-29
• [Presentation] Spin-polarized surface states induced by spin-orbit interaction on semiconductor surfaces (2012)
  • Author(s): 有賀哲也
  • Organizer: 村田セミナー
  • Place of Presentation: 東京
  • Year and Date: 2012-07-29
• [Presentation] Large Rashba spin splitting on semiconductor surfaces (2012)
  • Author(s): T. Aruga
  • Organizer: Collaborative Conference on Materials Research
  • Place of Presentation: Seoul
  • Year and Date: 2012-06-25
• [Presentation] Large Rashba Spin Splitting on Semiconductor Surfaces" (2011)
  • Author(s): T. Aruga
  • Organizer: 29th International Brandt Ritchie Workshop on Particle Penetration Phenomena and Excitations of Solids
  • Place of Presentation: Matsue
  • Year and Date: 20110512-15
• [Presentation] First-order transition following precursory relaxation of Peierls distortion on In/Si(111) (2010)
  • Author(s): S. Hatta, S. Miyamoto, Y. Ohtsubo, H. Tajiri, O. Sakata, H. Okuyama, T. Aruga
  • Organizer: 18th International Vacuum Congress
  • Place of Presentation: Beijing
  • Year and Date: 20100823-27
• [Presentation] Rashba spin-orbit interaction in metallic semiconductor surface states (2010)
  • Author(s): K. Yaji, Y. Ohtsubo, S. Hatta, H. Okuyama, T. Aruga
  • Organizer: 18th International Vacuum Congress
  • Place of Presentation: Beijing
  • Year and Date: 20100823-27
• [Presentation] Spin polarization of Shockley-type semiconductor surface state (2010)
  • Author(s): Y. Ohtsubo, K. Yaji, S. Hatta, H. Okuyama, K. Miyamoto, T. Okuda, A. Kimura, H. Namatame, M. Taniguchi, T. Aruga
  • Organizer: 37th International Conference on Vacuum Ultraviolet and X-ray Physics
  • Place of Presentation: Vancouver
  • Year and Date: 20100711-16
• [Presentation] Rashba spin splitting of a monolayer Pb-covered Ge(111) surface (2010)
  • Author(s): K. Yaji, Y. Ohtsubo, S. Hatta, H. Okuyama, K. Miyamoto, T. Okuda, A. Kimura, H. Namatame, M. Taniguchi, T. Aruga
  • Organizer: 37th International Conference on Vacuum Ultraviolet and X-ray Physics
  • Place of Presentation: Vancouver
  • Year and Date: 20100711-16
• [Presentation] Rashba spin splitting at semiconductor surfaces (2010)
  • Author(s): T. Aruga
  • Organizer: SSSJ-A3 Foresight Joint Symposium on Nanomaterials and Nanostructures
  • Place of Presentation: Tokyo
  • Year and Date: 20100705-07
• [Presentation] Rashba Effect at Surfaces (2010)
  • Author(s): T. Aruga
  • Organizer: The 4th International Workshop on Spin Currents & 2nd International Workshop on Spincaloritronics
  • Place of Presentation: 東北大学
  • Year and Date: 20100208-10
• [Presentation] Large Rashba spin splitting on Bi/Ge(111)-(√3×√3)R30° (2009)
  • Author(s): Y. Ohtsubo, K. Yaji, S. Hatta, H. Okuyama, K. Miyamoto, T. Okuda, A. Kimura, H. Namatame, M. Taniguchi, T. Aruga
  • Organizer: 11th International Conference on Electronic Spectroscopy and Structure
  • Place of Presentation: Nara
  • Year and Date: 20091006-11
• [Presentation] Rashba spin splitting of metallic surface state for 4/3-monolayer Pb/Ge(111) (2009)
  • Author(s): K. Yaji, Y. Ohtsubo, S. Hatta, H. Okuyama, K. Miyamoto, T. Okuda, A. Kimura, H. Namatame, M. Taniguchi, and T. Aruga
  • Organizer: 11th International Conference on Electronic Spectroscopy and Structure (ICESS-11)
  • Place of Presentation: Nara
  • Year and Date: 20091006-10
• [Presentation] Giant Rashba spin splitting of surface-resonance bands on Bi/Ge(111)-(√3× √3) (2009)
  • Author(s): S. Hatta, Y. Ohtsubo, H. Okuyama, T.Aruga
  • Organizer: 26th European Conference on Surface Science
  • Place of Presentation: Parma, Italy
  • Year and Date: 20090830-0904
• [Presentation] 表面におけるRashba効果 (2009)
  • Author(s): T. Aruga
  • Organizer: 第1回岩澤コンファレンス
  • Place of Presentation: 東京
  • Year and Date: 2009-05-30
• [Book] 現代表面科学3 表面物性 (2012)
  • Author(s): 有賀哲也
  • Publisher: 共立出版
• [Remarks]
  • URL: http://kuchem.kyoto-u.ac.jp/hyoumen/
• [Patent(Industrial Property Rights)] 超薄膜の電気伝導の測定における多端子プローブ、測定装置及び測定方法 (2012)
  • Inventor(s): 八田振一郎、有賀哲也
  • Industrial Property Rights Holder: 京都大学
  • Industrial Property Number: 特許第37844444号
  • Filing Date: 2012-01-24