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Electronic structure and phonons of low-dimensional metals prepared on crystal surfaces

Research Project

Project/Area Number 16340090
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics I
Research InstitutionKyoto University

Principal Investigator

ARUGA Tetsuya  Kyoto University, Chemistry Department, Professor, 大学院理学研究科, 教授 (70184299)

Co-Investigator(Kenkyū-buntansha) OKUYAMA Hiroshi  Kyoto University, Chemistry Department, Associate Professor, 大学院理学研究科, 助教授 (60312253)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥16,100,000 (Direct Cost: ¥16,100,000)
Fiscal Year 2006: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2005: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 2004: ¥9,100,000 (Direct Cost: ¥9,100,000)
Keywordssurface / phase transition / charge density wave / angle-resolved photoemission / 相転移 / パイエルス転移 / 臨界散乱 / イジング模型 / 振動分光
Research Abstract

In low-dimensional metals, the effects interactions, such as electron-electron and electron-phonon ones, plays significant roles to give rise to intriguing phenomena such as density waves and superconductivity. Photoelectron spectroscopy provides single-particle spectral functions and hence serves as a powerful technique in low-dimensional physics. The aim of this work was to study electronic properties of low-dimensional structures prepared on surfaces by angle-resolved photoelectron spectroscopy (ARPES) and to study phonon dispersion of such materials by ultrahigh resolution electron energy loss spectroscopy (UREELS), and eventually to reveal the mechanisms of new and interesting phenomena at surfaces. The Fermiology and the temperature dependence of a CDW gap on In/Cu(001) CDW system exhibited weak-coupling-like appearance, which however contradicted with other qualitative characteristics of the phase transition. We therefore measured the critical X-ray scattering during the phase transition. By analyzing the lattice correlation length above the 2D Ising transition and comparing it with the CDW correlation length obtained by ARPES, we have succeeded in categorizing the phase transition to a strong-coupling, long-coherence type, which usually was not known. This is the most significant achievement of this work. We also studied the magnetism of ultrathin Mn-Pd surface alloys and novel phase transition in Bi monolayer on Ag(001) driven by vacancy-configuration entropy. During the latter study, we found a giant Rashba spin-orbit splitting in Bi/Ag(001), which is nearly an order of magnitude larger than those previously known. The study of this phenomenon is currently under way.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (20 results)

All 2007 2006 2005 Other

All Journal Article (20 results)

  • [Journal Article] Transition between tetramer and monomer phases driven by vacancy configuration entropy on Bi/Ag(001)2007

    • Author(s)
      T.Nakagawa, O.Ohgami, Y.Saito, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys. Rev. B 75

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Transition between tetramer and monomer phases driven by vacancy configuration entropy on Bi/Ag(001)2007

    • Author(s)
      T.Nakagawa, 0.Ohgami, Y.Saito, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys.Rev. B75

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Surface Peierls transition on Cu(001) covered with heavier p-block metals2006

    • Author(s)
      T.Aruga
    • Journal Title

      Surf. Sci. Rep. 61

      Pages: 283-302

    • NAID

      120001001903

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Surface Peierls transition on Cu(001) covered with heavier p-block metals2006

    • Author(s)
      T.Aruga
    • Journal Title

      Surf.Sci.Rep. 61

      Pages: 283-302

    • NAID

      120001001903

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Long-period surface structure stabilized by Fermi surface nesting : Cu(001)-(◇20x√<20>)R26.6゜-In2006

    • Author(s)
      T.Nakagawa, H.W.Yeom, E.Rotenberg, B.Krenzer, S.D.Kevan, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys. Rev. B 73

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Anisotropic water chain growth on Cu(110) observed with scanning tunneling2006

    • Author(s)
      T.Yamada
    • Journal Title

      Phys.Rev.Lett. 96

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Temperature dependence of the charge-density-wave energy gap on In/Cu (001)2005

    • Author(s)
      S.Hatta, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys. Rev. B 71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Structures and magnetism of two types of c(2x2)-Mn/Pd(001) surface alloys2005

    • Author(s)
      N.Tsuboi, H.Okuyama, T.Aruga
    • Journal Title

      Phys. Rev. B 71

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Order-disorder transition in the surface charge-density wave phase of Cu(001)-c(4x4)-In2005

    • Author(s)
      S.Hatta, H.Okuyama, T.Aruga,, O.Sakata
    • Journal Title

      Phys. Rev. B 72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evolution of geometric and electronic structure at the Bi/Ag(001) interface2005

    • Author(s)
      T.Nakagawa, Y.Saito, O.Ohgami, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys. Rev. B 72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature dependence of the charge-density-wave energy gap on In/Cu(001)2005

    • Author(s)
      S.Hatta, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys.Rev. B71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Structures and magnetism of two types of c(2x2)-Mn/Pd(001) surface alloys2005

    • Author(s)
      N.Tsuboi, H.Okuyama, T.Aruga
    • Journal Title

      Phys.Rev. B71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Order-disorder transition in the surface charge-density-wave phase of Cu(001)-c(4x4)-In2005

    • Author(s)
      S.Hatta, H.Okuyama, T.Aruga, O.Sakata
    • Journal Title

      Phys.Rev. B72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Evolution of geometric and electronic structure at the Bi/Ag(001) interface2005

    • Author(s)
      T.Nakagawa, Y.Saito, O.Ohgami, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Phys.Rev. B72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Order-disorder transition in the surface charge-density-wave phase of Cu(001)-c(4x4)-In2005

    • Author(s)
      S.Hatta
    • Journal Title

      Phys.Rev.B 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] X-ray Diffraction Study of the Charge-Density-Wave Phase Transition on In/Cu(001)2005

    • Author(s)
      T.Aruga
    • Journal Title

      SPring-8 Research Frontiers 2004

      Pages: 52-53

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Temperature dependence of the charge-density-wave energy gap on In/Cu(001)2005

    • Author(s)
      S.Hatta
    • Journal Title

      Phys.Rev.B 71

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Evolution of geometric and electronic structure at the Bi/Ag(001) interface2005

    • Author(s)
      T.Nakagawa
    • Journal Title

      Phys.Rev.B 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Temperature dependence of the charge-density-wave energy gap on In/Cu(001)2005

    • Author(s)
      S.Hatta, H.Okuyama, M.Nishijima, T.Aruga
    • Journal Title

      Physical Review B 71

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Structure and magnetism of two types of c(2x2)-Mn/Pd(100) surface alloys

    • Author(s)
      N.Tsuboi, H.Okuyama, T.Aruga
    • Journal Title

      Physical Review B (発表予定)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2020-05-15  

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