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Construction on anomalous heat transport theory for metal/oxide/metal three-layer thin film

Research Project

Project/Area Number 19H02087
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Yamashita Yuichiro  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 主任研究員 (60462834)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2019: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Keywordsナノスケール熱輸送 / サーモリフレクタンス測定 / 伝熱シミュレーション / スパッタリング / 酸化物薄膜 / 熱伝導率 / 薄膜熱輸送 / 界面熱抵抗 / 界面ラフネス / 熱伝導 / アモルファス / サーモリフレクタンス法 / ナノスケール / 多層薄膜 / フォノン熱伝導 / 薄膜 / 分子動力学法 / 薄膜熱物性 / シミュレーション / データベース
Outline of Research at the Start

金属/酸化物/金属の3層薄膜では酸化物層の薄膜化により金属/酸化物界面熱抵抗が消失もしくは急減する特異熱輸送現象となる。本研究は、高誘電率酸化物層の導入、酸化物層へのドーピングや単結晶化により、誘電率、導電性に加え構造(界面・結晶性)を制御し、高速熱過渡現象をパルス光加熱サーモリフレクタンス法により観測し、特異熱輸送現象の発現を体系的に把握する。さらに分子動力学法や第1原理計算を用いた熱輸送計算からその学理解明に迫る。得られた実験結果および熱物性データはデータベースとして整備・共有する。

Outline of Final Research Achievements

Metal/metal oxide/metal 3-layer films exhibit anomalous heat transport, i.e. a drastic reduction in the thermal resistance for the interfaces and the interlayer, when the interlayer thickness is approximately less than 3 nm. The purpose of this research is to elucidate the mechanism of this anomalous heat transport based on experimental and computational approaches. From the experiment, the anomalous heat transport starts below about 3 nm HfO2 thickness, in agreement with previous reports. Furthermore, the numerical simulation shows that the interface roughness between Mo and HfO2 causes the effective reduction of the thermal resistance. It is therefore concluded that this anomalous heat transport is due to nanoscale interface roughness.

Academic Significance and Societal Importance of the Research Achievements

表面粗さに伴う伝熱促進は主に固体―液体、固体―気体の界面を対象に研究されてきた。本研究成果はナノスケールの界面ラフネスを持つ極薄金属酸化物薄膜について、その両側を高熱伝導性の金属膜で挟めば、固体―固体界面においても顕著な熱抵抗減少(伝熱促進)効果が現れる事を実験と計算の両面で示した。これより固体デバイスの高効率エネルギー利用につながるナノスケールでの伝熱性能向上に向けた界面エンジニアリングへの発展が期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (10 results)

All 2023 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (9 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results)

  • [Journal Article] Thermal conductivity across the van der Waals layers of α-MoO3 thin films composed of mosaic domains with in-plane 90° rotations2021

    • Author(s)
      Yuichiro Yamashita, Yuzuki Aoki, Takashi Yagi, Junjun Jia, Makoto Kashiwagi, Yuki Oguchi, Naoyuki Taketoshi, Yuzo Shigesato
    • Journal Title

      Journal of applied physics

      Volume: 130 Issue: 8

    • DOI

      10.1063/5.0052015

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Development of a time domain thermoreflectance measurement signal simulator: effect of interface roughness of multilayered thin film on thermal resistance2023

    • Author(s)
      Yuichiro Yamashita and Takashi Yagi
    • Organizer
      Spin caloritronics XII
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Mo/アモルファスHfO2/Mo 3層薄膜構造における界面を跨ぐ熱輸送2021

    • Author(s)
      山下雄一郎、八木貴志
    • Organizer
      第42回日本熱物性シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Anomaly thermal resistance reduction on Mo/amorphous HfO2/Mo three-layer thin film2021

    • Author(s)
      Yuichiro Yamashita
    • Organizer
      The Twenty-First Symposium on Thermophysical Properties
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermal Transport Character of Hetero-Epitaxial Metal Oxides Thin Film and Thermophysical Property Database for Nanomaterials2021

    • Author(s)
      Yuichiro Yamashita, Takashi Yagi, Makoto Kashiwagi, Jia Junjun, Naoyuki Taketoshi, and Yuzo Shigesato
    • Organizer
      Material Research Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] パルス光加熱サーモリフレクタンス測定信号シミュレーターの開発(1) - 手法と解析対象 -2020

    • Author(s)
      山下雄一郎、八木貴志
    • Organizer
      第41回日本熱物性シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Mo/HfO2/Mo三層薄膜における熱輸送特性2020

    • Author(s)
      山下雄一郎
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] フォノン熱輸送シミュレーションによる薄膜熱応答解析 -周波数に依存する界面散乱の影響-2019

    • Author(s)
      山下雄一郎、八木貴志
    • Organizer
      第56回 日本伝熱シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 機械学習を援用する熱物性測定データ解析の検討 -パルス光加熱サーモリフレクタ ンス法-2019

    • Author(s)
      山下雄一郎、八木貴志
    • Organizer
      第40回日本熱物性シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] THERMAL RESPONSE ANALYSIS FOR THIN FILM WITH VARIOUS THICKNESSES USING PHONON THERMAL TRANSPORT SIMULATION2019

    • Author(s)
      Yuichiro Yamashita, Takashi Yagi
    • Organizer
      The 2nd Pacific Rim Thermal Engineering Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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