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Structure and Dynamics of Excited States in Glasses Studied by Pulsed Neutron Scattering

Research Project

Project/Area Number 10440094
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionHigh Energy Accelerator Research Organization

Principal Investigator

ARAI Masatoshi  Institute of Materials Structure Science, High Energy Accelerator Research Organization, Professor, 物質構造科学研究所, 教授 (30175955)

Co-Investigator(Kenkyū-buntansha) INO Takashi  Institute of Materials Structure Science, High Energy Accelerator Research Organization, Research Associate, 物質構造科学研究所, 助手 (10301722)
OTOMO Toshiya  Institute of Materials Structure Science, High Energy Accelerator Research Organization, Research Associate, 物質構造科学研究所, 助手 (90270397)
FURUSAKA Michihiro  Institute of Materials Structure Science, High Energy Accelerator Research Organization, Professor, 物質構造科学研究所, 教授 (60156966)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥12,800,000 (Direct Cost: ¥12,800,000)
Fiscal Year 1999: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1998: ¥9,700,000 (Direct Cost: ¥9,700,000)
Keywordspulsed neutron source / medium range order / inelastic neutron scattering / phonon / dispersion relation / dynamical structure factor / boson peak / non-crystalline materials / ガラス / ダイナミクス / 中性子
Research Abstract

The dynamical structure factors S(Q,E) of SiOィイD22ィエD2 glass and NiィイD267ィエD2ZrィイD233ィエD2 glass were measured by inelastic neutron scattering. The advance of pulsed neutron scattering technique enabled us to obtain the S(Q,E) in a wide momentum-energy space with high resolution and high neutron flux.
The dispersive excitations in these glasses are clearly observed for the first time, whose periodicity is defined by the respective static structure factors S(Q). This feature suggests the existence of quasi-Brillouine zone which originate from short range structure. However, the first sharp diffraction peak in S(Q), which correlate with the medium range order of glass structure, has no relation with dispersive behavior. The dispersive excitations in SiOィイD22ィエD2 glass is acoustic-like behavior, while that of NiィイD267ィエD2ZrィイD233ィエD2 glass optic-like one. This difference may be attributed to the rigidity of short range structure. It is considered that NiィイD267ィエD2ZrィイD233ィエD2 glass has no rigid structural units which surely appear in SiOィイD22ィエD2 glass. The Boson peak, which is a universal feature of glassy materials, is also proved to be strongly localized mode.
It must be noted that the dispersive behavior exists above the energy range of Boson peak. Our result is contrary to the Ioffe-Regel criteria which argue that no collective excitations should exist above an energy determined from correlation length of local density fluctuation. We can say that the observations of dynamic structure factor S(Q,E) over a wide range of momentum-energy space bring us fruitful information on structure and dynamics of glassy materials.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (36 results)

All Other

All Publications (36 results)

  • [Publications] M. Arai et al.: "Novel dynamics of vitreous silica and metallic glass"Philosophical Magazine B. 79. 1733-1739 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Incommensurate Spin Dynamics of Underdoped Superconductor YBa2Cu3O6.7"Physical Review Letters. 83. 608-611 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Novel existence of collective propagation mode and strongly localized mode in vitreous silica"Physica B. 263-264. 268-272 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y. Inamura et al.: "Peculiar suppression of the specific heat and boson peak intensity SiO2 glass"Physica B. 263-264. 299-302 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. M. Bennington et al.: "The structure and dynamics of hard carbon formed C60 fullerene"Physica B. 263-264. 632-635 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] E. Rat et al.: "Observation of the Crossover to Strong Scattering of Acoustic Phonons in Densified Silica"Physical Review Letters. 83. 1355-1358 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arai et al.: "Neutron production from lead targets for 12-GeV protons"J. Neurton Research. 8. 71-83 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T. Nishijima et al.: "Incommensurate spin dynamics of high-Tc superconductor YBa2Cu3O7-d"J of Phys. Chem. of Solid. 60. 1091-1094 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S. Mitsuda et al.: "Neutron diffraction study of triangular lattice antiferromagnet CuFeO2 under high magnetic field"JJ of Phys. Chem. of Solid. 60. 1249-1251 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arai et al.: "Incommensurate Spin Dynamics of Superconductor YBa2Cu3O6+x"American Institute of Physics Conference proceedings. 483. 172-175 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Novel dynamics of vitreous silica and metallic glass"Philosophical Magazine B. 79. 1733-1739 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Incommensurate Spin Dynamics of Underdoped Superconductor YbaィイD22ィエD2CuィイD23ィエD2OィイD26.7ィエD2"Physical Review Letters. 83. 608-611 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Novel existence of collective propagating mode and strongly localized mode in vitreous silica"Physica B. 263-264. 268-272 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y.Inamura, et al.: "Peculiar suppression of the specific heat and boson peak intensity of densified SiOィイD22ィエD2 glass"Physica B. 263-264. 299-302 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.M.Bennington et al: "The structure and dynamics of hard carbon formed from CィイD260ィエD2 fullerene"Physica B. 263-264. 632-635 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] E.Rat et al.: "Observation of the Crossover to Strong Scattering of Acoustic Phonons in Densified Silica"Physical Review Letters. 83. 1355-1358 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Neutron production from lead targets for 12-GeV protons"J. of Neutron Research. 8. 71-83 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Nishijima et al.: "Incommensurate spin dynamicsw of high-Tc superconductor YbaィイD22ィエD2CuィイD23ィエD2OィイD27-dィエD2"J. of Phys. Chem. Of Solid. 60. 1091-1094 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] S.Mitsuda et al.: "Neutron diffraction study of triangular lattice antiferromagnet CuFeOィイD22ィエD2 under high magnetic field"J. of Phys. Chem. Of Solids. 60. 1249-1251 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Arai et al.: "Incommensurate Spin Dynamics of Superconductor YbaィイD22ィエD2CuィイD23ィエD2OィイD26+xィエD2"American Institute of Physics Conference Proceedings. 483. 172-175 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Arai et al.: "Novel dynamics of vitreous silica and metallic glass"Philosophical Magazine B. 79. 1733-1739 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Arai et al.: "Incommensurate Spin Dynamics of Underdoped Superconductor YBa2Cu3O6.7"Physical Review Letters. 83. 608-611 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Arai et al.: "Novel existence of collective propagating mode and strongly localized mode in vitreous silica"Physica B. 263-264. 268-272 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y. Inamura et al.: "Peculiar suppression of the specific heat and boson peak intensity of densified SiO2 glass"Physica B. 263-264. 299-302 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S. M. Bennington et al.: "The structure and dynamics of hard carbon formed from C60 fullerene"Physica B. 263-264. 632-635 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] E. Rat et al.: "Observation of the Crossover to Strong Scattering of Acoustic Phonons in Densified Silica"Physical Review Letters. 83. 1355-1358 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Arai et al.: "Neutron production from lead targets for 12GeV protons"J. Neutron Research. 8. 71-83 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T. Nishijima et al.: "Incommensurate spin dynamics of high-Tc superconductor YBa2Cu3O7-d"J. of Phys. Chem. of Solid. 60. 1091-1094 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S. Mitsuda et al.: "Neutron diffraction study of triangular lattice antiferromagnet CuFeO2 under high magnetic field"J. of Phys. Chem. of Solid. 60. 1249-1251 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] M. Arai et al.: "Incommensurate Spin Dynamics of Superconductor YBa2Cu3O6+x"American Institute of Physics Conference Proceedings. 483. 172-175 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Otomo,M.Arai他: "Observation of collecitve excitation in the amorphous alloy Ni67Zr33" J.Non.Cryst.Solids. 232-234. 613-618 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Nojiri,K.Takahashi,M.Arai,M.Motokawa他: "Neutron diffraction experiments in repeating pulsed high magnetic fields" Physica B. 241-243. 175-178 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Inamura,M.Arai他: "Intermediate-range structure and low-energy dynamics of densified SiO2 glass" Physica B. 241-243. 903-905 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N.Nishijima,M.Arai他: "High energy spin excitation of a high-Tc superconductor YBa2Cu306.6" Physica B. 241-243. 540-542 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] D.Welz,M.Nishi,M.Arai,他: "Magnetic excitation of dimerized CuGeO3:continuum scattering and interchain modulation" Physica B. 241-243. 528-530 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Fujita,C.D.Frost,M.Arai他: "Spin dynamics of the spin-Peierls system CuGeO3 at various temperatures" Physica B. 241-243. 210-212 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2020-05-15  

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