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Making temperature-pressure contour map of sound wave relaxation strength of liquid water - toward verification of liquid-liquid phase transition scenario

Research Project

Project/Area Number 20K03789
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13010:Mathematical physics and fundamental theory of condensed matter physics-related
Research InstitutionHiroshima University

Principal Investigator

Kajihara Yukio  広島大学, 先進理工系科学研究科(総), 助教 (20402654)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords液体-液体相転移 / 水の熱力学異常 / 臨界ゆらぎ / 緩和現象 / 音波 / 非弾性X線散乱 / 音速 / 水 / 熱力学異常 / 比熱
Outline of Research at the Start

液体の水に対して、広い温度圧力範囲(融点から500度、常圧から5000気圧)で音速の緩和強度測定を行いその相図を作成する。注目するのは、緩和強度と液体-気体および液体-液体の2つの相転移に対応した臨界現象との関係である。緩和強度の増大傾向から、液体-液体相転移の存在あるいはその臨界点の位置に関する議論を試みる。また比熱、圧縮率など熱力学量の相図と比較することで、緩和強度と熱力学の相関を議論し、水の熱力学異常の起源に迫るとともに、液体-液体相転移の相転移論としての位置づけを目指す。

Outline of Final Research Achievements

Contour map of the sound wave relaxation strength (temperature and pressure dependence) for liquid water over a wide temperature and pressure range up to 500 C and 10000 bar were made. Two significant mountain/hill-like enhancements were observed, which are almost consistent with the contour map of the isochoric specific heat, suggesting that the specific heat originate from the sound wave relaxation phenomenon. We conclude that the origins of the two enhancements in the high-temperature region is due to critical fluctuation of the liquid-gas phase transition, and that in the low-temperature region near ambient conditions is due to critical fluctuation corresponding to the liquid-liquid phase transition, which is believed to exist in the supercooled region.

Academic Significance and Societal Importance of the Research Achievements

水は最もありふれた液体ですが、熱力学特性は他とはかなり異なる「異常液体」で、未だそのメカニズムは十分には分かっていません。今回の研究では比熱の起源が初めて実験的に特定できており、非常に価値のあるものです。今後水あるいは水溶液などの熱力学特性の理解が進み、様々な方面への応用が期待できます。また学術的には、液体-液体相転移という新しいタイプの相転移について、既知の液体-気体相転移との類似点と相違点を整理して議論しており、今後相転移論の進展が期待できます。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2023 2022 2021 Other

All Int'l Joint Research (4 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 1 results) Remarks (2 results)

  • [Int'l Joint Research] SLAC National Accelerator Laboratory/Advanced Photon Source(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Padova(イタリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] European XFEL/University of Duisburg-Essen(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Warsaw University of Technology/Polish Academy of Sciences(ポーランド)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Phonon dispersion curves in the type-I crystalline and molten clathrate compound Eu8Ga16Ge302023

    • Author(s)
      Hasegawa Takumi、Inui Masanori、Onimaru Takahiro、Kajihara Yukio、Hosokawa Shinya、Nakajima Yoichi、Matsuda Kazuhiro、Takabatake Toshiro、Hiroi Satoshi、Uchiyama Hiroshi、Tsutsui Satoshi
    • Journal Title

      Journal of Physics: Condensed Matter

      Volume: 35 Issue: 11 Pages: 114002-114002

    • DOI

      10.1088/1361-648x/acb0a5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental observation of mesoscopic fluctuations to identify origin of thermodynamic anomalies of ambient liquid water2023

    • Author(s)
      Kajihara Yukio、Inui Masanori、Matsuda Kazuhiro、Ishikawa Daisuke、Tsutsui Satoshi、Baron Alfred Q. R.
    • Journal Title

      Physical Review Research

      Volume: 5 Issue: 1 Pages: 013120-013120

    • DOI

      10.1103/physrevresearch.5.013120

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structural changes across thermodynamic maxima in supercooled liquid tellurium: A water-like scenario2022

    • Author(s)
      Sun Peihao、Monaco Giulio、Zalden Peter、Sokolowski-Tinten Klaus、Antonowicz Jerzy、Sobierajski Ryszard、Kajihara Yukio、Baron Alfred Q. R.、Fuoss Paul、Chuang Andrew Chihpin、Park Jun-Sang、Almer Jonathan、Hastings J. B.
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 28

    • DOI

      10.1073/pnas.2202044119

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experimental Observation of Maximum Density Fluctuation in Liquid Te2022

    • Author(s)
      Yukio Kajihara, Masanori Inui, Kazuhiro Matsuda, Koji Ohara
    • Journal Title

      arXiv

      Volume: 2201.10065 Pages: 1-5

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] Structural changes across thermodynamic maxima in supercooled liquid tellurium: a water-like scenario?2022

    • Author(s)
      Peihao Sun, Giulio Monaco, Peter Zalden, Klaus Sokolowski-Tinten, Jerzy Antonowicz, Ryszard Sobierajski, Yukio Kajihara, Alfred Q. R. Baron, Paul Fuoss, Andrew Chihpin Chuang, Jun-Sang Park, Jonathan Almer, J. B. Hastings
    • Journal Title

      arXiv

      Volume: 2201.06838 Pages: 1-24

    • Related Report
      2021 Research-status Report
    • Open Access / Int'l Joint Research
  • [Journal Article] Experimental Observation of Mesoscopic Fluctuations to Identify Origin of Thermodynamic Anomalies of Ambient Liquid Water2021

    • Author(s)
      Yukio Kajihara, Masanori Inui, Kazuhiro Matsuda, Daisuke Ishikawa, Satoshi Tsutsui
    • Journal Title

      arXiv

      Volume: 2111.06589 Pages: 1-14

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Presentation] 臨界ゆらぎに焦点を当てて液体の比熱を解釈する新たな枠組み構築の試み2023

    • Author(s)
      梶原行夫
    • Organizer
      物理学会2023年春季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Interpretion of thermodynamic anomalies of liquid water in terms of critical fluctuations2022

    • Author(s)
      Yukio Kajihara and Kazuhiro Matsuda
    • Organizer
      The 18th international conference on Liquid and Amorphous Metals (LAM18)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 小角散乱法よりも鋭敏な液体のメゾスコピックゆらぎ測定手法の提案2022

    • Author(s)
      梶原行夫、松田和博
    • Organizer
      第63回高圧力討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 低温高圧液体メタノールの非弾性X線散乱2021

    • Author(s)
      梶原行夫、乾雅祝、吉田亨次、山口敏男、松田和博、石川大介、アルフレッド・バロン
    • Organizer
      高圧力討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 「異常液体」水の比熱を理解する:相図を眺めてみると、、、2021

    • Author(s)
      梶原行夫
    • Organizer
      東大物性研短期研究会「ガラスおよび関連する複雑系の最先端科学」
    • Related Report
      2020 Research-status Report
  • [Remarks] 梶原行夫ホームページ

    • URL

      https://home.hiroshima-u.ac.jp/kajihara/index.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 広島大学:梶原行夫ホームページ

    • URL

      https://home.hiroshima-u.ac.jp/kajihara/index.html

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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