Spectroscopic study of pressure induced metallization of aluminum trihydride

• Project/Area Number: 23540365
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Gifu University
• Principal Investigator: KUME Tetsuji 岐阜大学, 工学部, 准教授 (30293541)
• Co-Investigator(Kenkyū-buntansha): SASAKI Shigeo 岐阜大学, 工学部, 教授 (30196159)
• Project Period (FY): 2011 – 2013
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
• Keywords: 光物性 / 高圧物性 / 金属水素化物 / 高圧極限 / 分光測定 / 金属化転移 / 構造相転移

Research Abstract

We successfully measured the optical absorption spectra of AlH3 under high pressures up to 130 GPa, by means of a diamond anvil cell. At 65 GPa, the sample became opaque, and the absorption spectral feature was consistent with the indirect interband transition. When the pressure was elevated further, the color of the sample did not change. However, the monotonic increase in absorption was found in the infrard energy region above 106 GPa. This increase was interpreted in terms of a plasma absorption of free electrons, by a theoretical simulation. Thus, this is the first report on optical response on the pressure induced metallization of AlH3.

Research Products

• [Journal Article] High pressure study of ScH3 : Raman, IR and visible absorption spectroscopies (2011)
  • Author(s): T.Kume, H.Ohura, T.Takeichi, A. Ohmura, A. Machida, T. Watanuki, K. Aoki, S. Sasaki, H. Shimizu, K.Takemura
  • Journal Title: Phys. Rev. B Volume: 84
  • Peer Reviewed
• [Journal Article] 高圧力下における希土類水素化物のラマン散乱および可視紫外吸収分光 (2011)
  • Author(s): 久米徹二, 町田晃彦, 青木勝敏, 佐々木重雄, 清水宏晏
  • Journal Title: 高圧力の科学と技術 Volume: 21 Pages: 184-189
  • NAID: 10029831617
  • Peer Reviewed
• [Journal Article] High pressure study of ScH3: Raman, IR and visible absorption spectroscopies (2011)
  • Author(s): T.Kume, H.Ohura, T.Takeichi, A. Ohmura, A. Machida, T. Watanuki, K. Aoki, S. Sasaki, H. Shimizu, K.Takemura
  • Journal Title: Phys. Rev. B Volume: 84 Issue: 6
  • DOI: 10.1103/physrevb.84.064132
  • Peer Reviewed
• [Presentation] ラマン散乱分光を用いた高圧物性研究 (2014)
  • Author(s): 久米徹二
  • Organizer: 第39回未来を拓く高圧力科学技術セミナーシリーズ「高圧力と分光技術」
  • Place of Presentation: 日本大学文理学部世田谷キャンパス
  • Year and Date: 2014-03-26
• [Presentation] ラマン散乱分光を用いた高圧物性研究 (2014)
  • Author(s): 久米徹二
  • Organizer: 第３９回未来を拓く高圧力科学技術セミナーシリーズ「高圧力と分光測定技術」
  • Place of Presentation: 日本大学文理学部世田谷キャンパス(東京)
  • Invited
• [Presentation] AlH3の高圧力下における光吸収に関する研究 (2013)
  • Author(s): 中村悠輔, 百瀬孝一, 久米徹二, 佐々木重雄, 松岡岳洋, 大村彩子, 中野智志, 折茂慎一
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 朱鷺メッセ
• [Presentation] AlH3の高圧力下における光吸収に関する研究 (2013)
  • Author(s): 中村悠輔，百瀬孝一，久米徹二，佐々木重雄，松岡岳洋，大村彩子，中野智志，折茂慎一
  • Organizer: 第54回高圧討論会
  • Place of Presentation: 朱鷺メッセ（新潟）
• [Presentation] 低温・高圧力下におけるダイヤモンド・アンビル・セルの圧力制御 (2012)
  • Author(s): 中村悠輔, 船橋健太, 久米徹二, 佐々木重雄
  • Organizer: 第53回高圧討論会
  • Place of Presentation: 大阪大学
• [Presentation] 低温・高圧力下におけるダイヤモンド・アンビル・セルの圧力制御 (2012)
  • Author(s): 中村悠輔、船橋健太、久米徹二、佐々木重雄
  • Organizer: 第53回高圧討論会
  • Place of Presentation: 大坂大学
• [Presentation] 立方晶系希土類三水素化物の高圧ラマン散乱及び紫外可視吸収分光 (2011)
  • Author(s): 中本琢磨, 志村直哉, 熊崎洋平, 久米徹二, 佐々木重雄, 清水宏晏, 青木勝敏, 綿貫徹, 町田晃彦
  • Organizer: 第52回高圧討論会
  • Place of Presentation: 沖縄キリスト教学院
  • Year and Date: 2011-11-09
• [Presentation] High Pressure Raman and Visible Absorption Study on Rare-Earth Trihydrides with FCC Structure (2011)
  • Author(s): T. Kume, T. Nakamoto, N. Shimura, S. Sasaki, H. Shimizu, A. Machida, T. Watanuki, K. Aoki, K. Takemura
  • Organizer: AIRAPT-23; International Conference on High Pressure, Science and Technology
  • Place of Presentation: Mumbai, India
  • Year and Date: 2011-09-30
• [Presentation] High Pressure Raman and Visible Absorption Study on Rare-Earth Trihydrides with FCC Structure (2011)
  • Author(s): T. Kume, T. Nakamoto, N. Shimura, S. Sasaki, H. Shimizu, A. Machida, T. Watanuki, K. Aoki, K. Takemura
  • Organizer: AIRAPT-23; International Conference on High Pressure Science and Technology
  • Place of Presentation: Mumbai, India
• [Presentation] 立方晶系希土類三水素化物の高圧ラマン散乱及び紫外可視吸収分光 (2011)
  • Author(s): 中本琢磨，志村直哉，熊崎洋平，久米徹二，佐々木重雄，清水宏晏，青木勝敏，綿貫徹，町田晃彦
  • Organizer: 第52回高圧討論会
  • Place of Presentation: 沖縄キリスト教学院，那覇