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Study of hydrogen-mode dynamics and phase transition mechanism by coherent phonon excitation

Research Project

Project/Area Number 06402009
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅰ(光物性・半導体・誘電体)
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

YAGI Toshirou  Hokkaido Univ., Res.Inst.for Electrn.Sci., Pro., 電子科学研究所, 教授 (30002132)

Co-Investigator(Kenkyū-buntansha) YAMAGUCHI Masashi  Hokkaido Univ., Fac.of Eng., Assoc.Pro., 工学部, 助教授 (80239912)
KASAHARA Masaru  Hokkaido Univ., Res.Inst.for Electrn.Sci., Res.Assoc., 電子科学研究所, 助手 (30001697)
TSUJIMA Yuhji  Hokkaido Univ., Res.Inst.for Electrn.Sci., Assoc.Pro., 電子科学研究所, 助教授 (20113673)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥32,700,000 (Direct Cost: ¥32,700,000)
Fiscal Year 1996: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1994: ¥29,300,000 (Direct Cost: ¥29,300,000)
KeywordsPHASE TRANSITION / ISBS / STIMULATED LIGHT SCATTERING / SELECTIVE EXCITATION / PHONON EXCITATION / SOFT MODE / POLARIZATION FLUCTUATION / 誘電光散乱
Research Abstract

In the first year, 1994, of this project, we concentrated our effort to construct newly the experimental system for coherent phonon excitation. The light source of the excitation pulse was a mode-locked Q-switched YLF laser. Two coherent light pulses, produced from one pulse by a half-mirror, with a time-width of 60 picosecond were coincided each other temporally and also spatially in a small area selected in the specimen The temporal interference pattern produces an electronic field strong enough to excite a phonon mode which begins to propagate in two opposite directions with a definite wave vector after the excite pulses passed through the excitation area. The excited phonons are probed in real time as a change of the intensity of the light diffracted from the phonons. In this stage of the study, a cw argon laser was employed as a light source of the probe light. In the second stage of the present project (1995-1996), we improved the system by introducing a pulse-probe method. The new version of the experimental system gave us an excellent signal to noise ratio of the light diffracted from the excited phonons. In the final period, 1996-1997, we applied our system to investigate the phase transition dynamics in several cases ; typical uniaxial ferroelectrics tri-glycine sulphate and selenate, a hydrogen-bonded ferroelectric rubidium hydrosulfate, a hydrogen-bonded ferroelastic potassium trihydrogen selenate, an orientational order-disorder ammonium chloride and water as a typical hydrogen system. Ineach case, we succeeded to excite a coherent phonon as an excellent probe to observe the dynamical aspect of the order parameter coupled with phonons. Exact values of the characteristic relaxation time were given for each of these cases in addition to a new phenomenon observed at just above the freezing point of the supercooled water.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (30 results)

All Other

All Publications (30 results)

  • [Publications] H. Furuta: "Impulsive stimulated Brillouin scattering study on the relaxation of the polarization fluctuation in ferroelectric TGS" Journal of the Physical Society of Japan. 64・11. 4113-4116 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S. Kinoshita: "Direct comparison between ultrafast optical Kerr effct and high-resolution light scattering spectroscopy" Physical Review Letters. 75・1. 148-151 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M. Yamaguchi: "Light scattering study of the coupled soft-optic and acoustic mode in hexagonal barium titanate" Physical Review Letters. 75・7. 1399-1402 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S. Yoshioka: "Impulsive stimulated light scattering study of RbHSO_4 : real time observation of relaxation time of polarization fluctuation" Journal of the Korean Physical Society. 29. S748-S750 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H. Furuta: "The relaxation time of the polarization fluctuation in ferroelectric TGS and TGSe by the impulsive stimulated Brillouin scattering" Physica B. 219&220. 541-543 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T. Shima: "Central peak of ferroelectric LiH_3(SeO_3)_2 near the melting point" Journal of the Physical Society of Japan. 65・4. 1102-1105 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Furuta, Y.Tsujimi, Y.Shimada and T.Yagi: "Impulsive stimulated Brillouin scattering study on the relaxation of the polarization fluctuation in ferroelectric TGS" J.Phys.Soc.Jpn.64-11. 4113-4116 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Kinoshita, Y.Kai, M.Yamaguchi and T.Yagi: "Direct comparison between ultrafast optical Kerr effect and high-resolution light scattering spectroscopy" Phys.Rev.Lett.75-1. 148-151 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] M.Yamaguchi, M.Watanabe, Y.Akishige, K.Inoue and T.Yagi: "Light scattering study of the coupled soft-optic and acoustic mode in hexagonal barium titanate" Phys.Rev.Lett.75-7. 1399-1402 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] S.Yoshioka, Y.Tsujimi and T.Yagi: "Impulsive stimulated light scattering study of PbHSO_4 : real time observation of relaxation time of polarization fluctuation" J.Korean Phys.Soc. (Proc.Suppl.). 29. S748-S750 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Furuta, S.Yoshioka, Y.Tsujimi, Y.Shimada, and T.Yagi: "The relaxation time of the polarization fluctuation in ferroelectric TGS and TGSe by the impulsive stimulated Brillouin scattering" Physica B. 219&220. 541-543 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Shima, M.Kasahara, P.Kaung and T.Yagi: "Central peak of ferroelectric LiH_3(SeO_3)_2 near the melting point" J.Phys.Soc.Jpn.65-4. 1102-1105 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Furuta: "Impulsive stimulated Brillouin scattering study on the relaxation of the polarization fluctuation in ferroelectric TGS" Journal of the Physical Society of Japan. 64・11. 4113-4116 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Kinoshita: "Direct comparison between ultrafast optical Kerr effect and high-resolution light scattering spectroscopy" Physical Review Letters. 75・1. 148-151 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] M.Yamaguchi: "Light scattering study of the coupled soft-optic and acoustic mode in hexagonal barium titanate" Physical Review Letters. 75・7. 1399-1402 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Yoshioka: "Impulsive stimulated light scattering study of RbHSO_4 : real time observation of relaxation time of polarization fluctuation" Journal of the Korean Physical Society. 29. S748-S750 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Furuta: "The relaxation time of the polarization fluctuation in ferroelectric TGS and TGSe by the impulsive stimulated Brillouin scattering" Physica B. 219&220. 541-543 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] T.Shima: "Central Park of ferroelectric LiH_3 (SeO_3)_2 near the melting point" Journal of the Physical Society of Japan. 65・4. 1102-1105 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Kinoshita,Y.Kai,M.Yamaguchi and T.Yagi,: "“Direct Comparison between Ultrafast Optical Kerr Effect and High-Resolution Light Scattering Spectroscopy"," Phys.Rev.Lett. 75. 148-151 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Yamaguchi,M.Yamaguchi and T.Yagi,: "“Brillouin Scattering Study of CuGeO_3"," J.Phys.Soc.Jpn.64. 1055-1058 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Yoshida,Y.Tsujimi and T.Yagi,: "“Brillouin Scattering Studies of the Antiferrodistortive Phase Transition in NaNO_3"," J.Phys.Soc.Jpn.64. 5-8 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] M.Yamaguchi,K.Inoue and T.Yagi and Y.Akishige,: "“Soft Acoustic Mode in the Ferroeorcric Phase Transition of Hexagonal Barium Titanate"," Phys.Rev.Lett.74. 2126-2129 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Kinoshita,Y.Kai,M.Yamaguchi,T.Yagi,: "“Direct comparison of femtosecond Fourier-transform Raman spectrum with spontaneous light scattering spectrum"," Chem.Phys.Lett.236. 259-264 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 山田興治、八木駿郎、他: "機能材料のための量子工学" 講談社サイエンティフィク, 220 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Yoshida: "Brillouin scattering studies of the antiferrodiseortive phase …" J.Phys.Soc.Jpn.64. 5-8 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Takesada: "Relation between α and β phases in the reconstructive phase …" J.Phys.Soc.Jpn.63. 4282-4285 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 八木駿郎: "光散乱実験用の除塵単結晶の作成" 個体物理. 29. 44-47 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Tsujimi: "The 90゚ Brillouin scattering in Tricrinic β-BiN_6O_4 …" J.Korean Phys.Soc.27. 92-95 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Yagi: "Low-frequency light scattering study on structural phase …" J.Korean Phys.Soc.27. 138-143 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Kinoshita: "Extremely early stage of ferroelastic domain formation …" Phys.Rev.B. 50. 5834-5837 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2020-05-15  

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