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Systematic understanding of oxygen vacancies and prediction by machine learning

Research Project

Project/Area Number 19H02416
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26010:Metallic material properties-related
Research InstitutionTokyo Institute of Technology

Principal Investigator

Kumagai Yu  東京工業大学, 科学技術創成研究院, 准教授 (00722464)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2020: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywords酸素空孔 / 第一原理計算 / ハイスループット計算 / 機械学習 / 点欠陥 / 酸化物 / マテリアルズインフォマティクス
Outline of Research at the Start

酸化物は、薄膜トランジスタや大容量不揮発性メモリ、光触媒等への応用が実現されている。酸化物の機能において中心的な役割を担っているのが酸素空孔であり、酸化物の電子・光特性を決定する要となる。そこで近年、第一原理計算を用いた酸素空孔の理論研究が盛んに行われるようになってきた。だが従来型の研究は、高々数種類の酸化物を対象としており、多数の酸化物を計算した例は存在しない。よって本研究では、数万規模の酸化物中の酸素空孔に対して第一原理計算を実行し、酸素空孔の学理構築を行うことを目的とする。また機械学習を用いたエネルギー・電子構造を予測するシステムを開発し、酸素空孔物性の起源解明と予測手法の確立を行う。

Outline of Final Research Achievements

Conventional point defect calculations were limited to individual studies of specific materials due to the complexity of the process. However, computer performance has improved dramatically over the years, and in recent years, it has become sufficient to perform systematic point defect calculations. Therefore, we performed systematic point defect calculations for several thousand materials and constructed a database of calculated materials. Furthermore, based on this database, we predicted point defect formation energies by machine learning and discovered peculiar phenomena related to point defects.

Academic Significance and Societal Importance of the Research Achievements

物質中には、点欠陥が多数存在し、それらが材料機能発現において重要な役割を担っている。しかしながら、点欠陥特性を詳細に調べるため必要な原子レベルでの解析を、実験により行うことは極めて難しい。そこで近年、電子に関する量子力学の基本方程式を解く、第一原理計算を用いて点欠陥特性を調べる研究が行われる様になってきた。本研究では、数千物質を対象に系統的な点欠陥計算を行い、それらの計算材料データベース構築を行なった。これにより、効率的な新材料探索につながると期待される。

Report

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

    (27 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (13 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 13 results,  Open Access: 3 results) Presentation (13 results) (of which Int'l Joint Research: 2 results,  Invited: 11 results)

  • [Int'l Joint Research] Max-Planck-Institute(ドイツ)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Recommendation of interstitial hydrogen positions in metal oxides2022

    • Author(s)
      Tsunoda Naoki、Kumagai Yu、Oba Fumiyasu
    • Journal Title

      Computational Materials Science

      Volume: 203 Pages: 111068-111068

    • DOI

      10.1016/j.commatsci.2021.111068

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Insights into oxygen vacancies from high-throughput first-principles calculations2021

    • Author(s)
      Kumagai Yu、Tsunoda Naoki、Takahashi Akira、Oba Fumiyasu
    • Journal Title

      Physical Review Materials

      Volume: 5 Issue: 12

    • DOI

      10.1103/physrevmaterials.5.123803

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Theoretical Prediction and Thin-Film Growth of the Defect-Tolerant Nitride Semiconductor YZn<sub>3</sub>N<sub>3</sub>2021

    • Author(s)
      Kikuchi Ryosuke、Nakamura Toru、Kurabuchi Takahiro、Kaneko Yasushi、Kumagai Yu、Oba Fumiyasu
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 21 Pages: 8205-8211

    • DOI

      10.1021/acs.chemmater.1c02149

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Point defects in p-type transparent conductive CuMO2 (M = Al, Ga, In) from first principles2021

    • Author(s)
      Gake Tomoya、Kumagai Yu、Takahashi Akira、Oba Fumiyasu
    • Journal Title

      Physical Review Materials

      Volume: 5 Issue: 10 Pages: 104602-104602

    • DOI

      10.1103/physrevmaterials.5.104602

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] SrZn2N2 as a Solar Absorber: Theoretical Defect Chemistry and Synthesis by Metal Alloy Nitridation2021

    • Author(s)
      Kikuchi Ryosuke、Ueno Koki、Nakamura Toru、Kurabuchi Takahiro、Kaneko Yasushi、Kumagai Yu、Oba Fumiyasu
    • Journal Title

      Chemistry of Materials

      Volume: 33 Issue: 8 Pages: 2864-2870

    • DOI

      10.1021/acs.chemmater.1c00075

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical enhancement of dielectric permittivity in reduced lanthanum aluminate2020

    • Author(s)
      Nagai Takayuki、Kuwabara Akihide、Kumagai Yu、Terasaki Ichiro、Taniguchi Hiroki
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 18 Pages: 184114-184114

    • DOI

      10.1103/physrevb.101.184114

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical exploration of mixed-anion antiperovskite semiconductors M3XN (M = Mg, Ca, Sr, Ba; X = P, As, Sb, Bi)2020

    • Author(s)
      Mochizuki Yasuhide、Sung Ha-Jun、Takahashi Akira、Kumagai Yu、Oba Fumiyasu
    • Journal Title

      Physical Review Materials

      Volume: 4 Issue: 4 Pages: 044601-044601

    • DOI

      10.1103/physrevmaterials.4.044601

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Data-Mining Element Charges in Inorganic Materials2020

    • Author(s)
      Ding Yu、Kumagai Yu、Oba Fumiyasu、Burton Lee A.
    • Journal Title

      The Journal of Physical Chemistry Letters

      Volume: 11 Issue: 19 Pages: 8264-8267

    • DOI

      10.1021/acs.jpclett.0c02072

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Machine learning models for predicting the dielectric constants of oxides based on high-throughput first-principles calculations2020

    • Author(s)
      Takahashi Akira、Kumagai Yu、Miyamoto Jun、Mochizuki Yasuhide、Oba Fumiyasu
    • Journal Title

      Physical Review Materials

      Volume: 4 Issue: 10 Pages: 103801-103801

    • DOI

      10.1103/physrevmaterials.4.103801

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Finite-size corrections for defect-involving vertical transitions in supercell calculations2020

    • Author(s)
      Gake Tomoya、Kumagai Yu、Freysoldt Christoph、Oba Fumiyasu
    • Journal Title

      Physical Review B

      Volume: 101 Issue: 2 Pages: 020102-020102

    • DOI

      10.1103/physrevb.101.020102

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Stabilization of small polarons in BaTiO3 by local distortions2019

    • Author(s)
      Tsunoda Naoki、Kumagai Yu、Oba Fumiyasu
    • Journal Title

      Physical Review Materials

      Volume: 3 Issue: 11 Pages: 114602-114602

    • DOI

      10.1103/physrevmaterials.3.114602

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spin-Glass Magnetic Properties of A-Site Columnar-Ordered Quadruple Perovskites Y2MnGa(Mn4?xGax)O12 with 0 ? x ? 32019

    • Author(s)
      Liu Ran、Khalyavin Dmitry D.、Tsunoda Naoki、Kumagai Yu、Oba Fumiyasu、Katsuya Yoshio、Tanaka Masahiko、Yamaura Kazunari、Belik Alexei A.
    • Journal Title

      Inorganic Chemistry

      Volume: 58 Issue: 21 Pages: 14830-14841

    • DOI

      10.1021/acs.inorgchem.9b02542

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Achieving non-degenerate Zn3N2 thin films by near room temperature sputtering deposition2019

    • Author(s)
      Wang Yong、Ohsawa Takeo、Kumagai Yu、Harada Kou、Oba Fumiyasu、Ohashi Naoki
    • Journal Title

      Applied Physics Letters

      Volume: 115 Issue: 9 Pages: 092104-092104

    • DOI

      10.1063/1.5101037

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 酸素空孔に関する系統的計算と機械学習2022

    • Author(s)
      熊谷 悠
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 計算材料データベースの開発2021

    • Author(s)
      熊谷 悠
    • Organizer
      第88回マテリアルズ・テーラリング研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 非金属物質中の点欠陥を対象とした系統的第一原理計算2021

    • Author(s)
      熊谷 悠
    • Organizer
      第1回計算イオニクス研究会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 計算材料データベースの構築に関して2021

    • Author(s)
      熊谷 悠
    • Organizer
      第6回アドバンス・シミュレーション・セミナー2021
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 理論計算・データ科学による機能性セラミックス材料開発の革新2021

    • Author(s)
      熊谷 悠
    • Organizer
      金属材料研究所ワークショップ・セラミックス材料をめぐる最近の研究動向
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Automation of First-Principles Point Defect Calculations for Non-Metallic Materials2021

    • Author(s)
      Yu Kumagai, Akira Takahashi, Fumiyasu Oba
    • Organizer
      MRM2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 酸化物に関する計算材料データベース構築2021

    • Author(s)
      熊谷 悠
    • Organizer
      2020年度第5回物性アプリオープンフォーラム
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 計算材料データベース構築とその応用2021

    • Author(s)
      熊谷 悠
    • Organizer
      日本セラミックス協会2021年年会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 酸化物物性と酸素空孔に関する系統的計算2020

    • Author(s)
      熊谷 悠
    • Organizer
      第30回日本MRS年次大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 半導体材料探索に向けた計算データベースの開発:酸化物を例として2019

    • Author(s)
      熊谷 悠
    • Organizer
      応用物理学会シリコンテクノロジー分科会 モデリング研究委員会研究集会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] High-throughput computations on oxygen vacancies and their machine learning2019

    • Author(s)
      Yu Kumagai
    • Organizer
      The 3rd Innovation Camp for Computational Materials Science
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 第一原理計算による半導体物性の計算手法開発2019

    • Author(s)
      熊谷 悠
    • Organizer
      2019年理研シンポジウム: 計算で物事を理解する予測する~データサイエンス、自然知能、そして圏論へ
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] High-Throughput Calculations and Machine-Learning Prediction of Oxygen Vacancy Formation Energies2019

    • Author(s)
      Yu Kumagai
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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