Small- and wide-angle scattering measurement of suppression of Peielrs distortion in liquids

2010 Fiscal Year Final Research Report

• Project/Area Number: 21740265
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: Keio University
• Principal Investigator: CHIBA Ayano Keio University, 理工学部, 助教 (20424195)
• Project Period (FY): 2009 – 2010
• Keywords: 液体 / 金属

Research Abstract

It is well-known that there are pressure-induced suppressions of distortions in crystalline systems. For liquids, same kinds of pressure-induced structural changes have been expected. To clarify the possibility of such structural changes and how pressure affect the structure in liquids, we performed x-ray diffraction measurements under high pressure and high temperature. We designed a new pressure cell to cover wide scale (i.e., low scattering angles) of fluctuations, and studied polymer melt and liquid GeTe mixtures. For the polymer melt, we found a pressure-induced second-order-like phase transition for the first time, and for the liquid GeTe, we clarified the phase diagram of this liquid system under pressure.

Research Products

• [Journal Article] Pressure-Induced Structural Changes in Liquid Ge33Te67 and Liquid Ge15Te85 (2010)
  • Author(s): Jumpei Nakamura, Ayano Chiba, Kazuhiko Tsuji
  • Journal Title: Journal of Physical Society of Japan 79 Pages: 064604
  • Peer Reviewed
• [Journal Article] Pressure-induced structural change in liquid Ge0.15Te0.85 alloy (2010)
  • Author(s): T.Tsukatani, A.Chiba, K.Tsuji
  • Journal Title: Journal of Physics : Conference Series 215 Pages: 012076
  • Peer Reviewed
• [Journal Article] Pressure dependence of hopping conduction in amorphous Ge alloys (2010)
  • Author(s): Mariko Sugisaki, Ayano Chiba, Kazuhiko Tsuji
  • Journal Title: Journal of Physics : Conference Series 215 Pages: 012082
  • Peer Reviewed
• [Journal Article] Relationship between Peierls Distortion and Medium-Range Order in Liquid Group-V elements and Liquid Group-IV-VI Compounds (2010)
  • Author(s): A Chiba, M Tomomasa, T Hayakawa, A Hinzmann, R Takahashi, J Nakamura, T Tsukatani, T Kumazawa, K Tsuji
  • Journal Title: Journal of Physics : Conference Series 215 Pages: 012077
  • Peer Reviewed
• [Journal Article] Bennington, Alex C.Hannon, and Kazuhiko Tsuji, Pressure-induced suppression of the Peierls distortion of liquid As and GeX (X=S,Se,Te) (2009)
  • Author(s): Ayano Chiba, Masatoshi Tomomasa, Takazumi Hayakawa, Stephen M.
  • Journal Title: Physical Review B 80 Pages: 060201(R)
  • Peer Reviewed
• [Presentation] 液体Te-Ge合金の圧力・温度誘起相転移 (2011)
  • Author(s): 塚谷知也、千葉文野、辻和彦
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学五十嵐キャンパス
  • Year and Date: 2011-03-26
• [Presentation] 溶融高分子の中距離秩序 (2011)
  • Author(s): 千葉文野、船守展正、中山和也、大石泰生、辻和彦、竹中幹人
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-26
• [Presentation] 中性子非弾性散乱実験による液体研究の可能性:単体、二元系を中心に (2011)
  • Author(s): 千葉文野
  • Organizer: J-PARC・MLFにおける中性子強磁場実験環境、高圧実験環境についての検討会、いばらき量子ビーム研究センター(招待)
  • Place of Presentation: 茨城県東海村
  • Year and Date: 2011-03-09
• [Presentation] 液体V族の圧力誘起液液転移 (2011)
  • Author(s): 千葉文野
  • Organizer: 地球惑星科学研究会・高圧物質科学研究会2010年度合同研究会合、SPring-8放射光普及棟(招待)
  • Place of Presentation: 大講堂
  • Year and Date: 2011-01-05
• [Presentation] 液体V族の圧力誘起構造変化 (2010)
  • Author(s): 千葉文野、塚谷知也、辻和彦
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学 中百舌鳥キャンパス
  • Year and Date: 2010-09-25
• [Presentation] Pressure-induced structural changes of liquid group-V elements (2010)
  • Author(s): Ayano Chiba, Tomoya Tsukatani, Kazuhiko Tsuji
  • Organizer: 14th LIquid and Amorphous Metals conference
  • Place of Presentation: University of Rome
  • Year and Date: 2010-07-12
• [Presentation] Pressure- and temperature-induced structural changes of liquid Ge0.15Te0.85 alloy (2010)
  • Author(s): Tomoya Tsukatani, Ayano Chiba, Kazuhiko Tsuji
  • Organizer: 14th LIquid and Amorphous Metals conference
  • Place of Presentation: University of Rome, Italy
  • Year and Date: 2010-07-12
• [Presentation] 液体Biの圧力誘起構造変化 (2010)
  • Author(s): 千葉文野、塚谷知也、辻和彦
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] 液体Sb、液体Biの圧力誘起構造変化 (2009)
  • Author(s): 千葉文野、塚谷知也、中山和也、西田麻耶、辻和彦
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-27
• [Presentation] はじめに(領域6・12合同シンポジウム企画立案の説明) (2009)
  • Author(s): 千葉文野
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学黒髪キャンパス
  • Year and Date: 2009-09-26
• [Presentation] Pressure-Induced Structural Change of Liquid Group-V Elements and Liquid Group-IV-VI Compounds (2009)
  • Author(s): A.Chiba, M.Tomomasa, T.Hayakawa, A.Hinzmann, R.Takahashi, J.Nakamura, T.Tsukatani, T.Kumazawa, K.Tsuji
  • Organizer: AIRAPT-22
  • Place of Presentation: Tokyo International Exchange Center, Odaiba, Tokyo, Japan
  • Year and Date: 2009-07-31
• [Presentation] Pressure-Induced Structural Change in Liquid Ge0.15Te0.85 alloy (2009)
  • Author(s): Tomoya Tsukatani, Ayano Chiba, Kazuhiko Tsuji
  • Organizer: AIRAPT-22
  • Place of Presentation: Tokyo International Exchange Center, Odaiba, Tokyo, Japan
  • Year and Date: 2009-07-30
• [Presentation] Pressure Dependence of Hopping Conduction in Amorphous Ge alloys (2009)
  • Author(s): Mariko Sugisaki, Ayano Chiba, Kazuhiko Tsuji
  • Organizer: AIRAPT-22
  • Place of Presentation: Tokyo International Exchange Center, Odaiba, Tokyo, Japan
  • Year and Date: 2009-07-30
• [Remarks] ホームページ等
  • URL: http://www.phys.keio.ac.jp/guidance/labs/tsuji/member/ayano/top.html
• [Remarks] 研究解説等
  • URL: http://www.youtube.com/watch?v=rTpBzCQVZ1U