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局在量子構造に基づいた新しい材料機能創出技術の構築

Research Project

Project/Area Number 12130101
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionKyoto University

Principal Investigator

足立 裕彦  京都大学, 工学研究科, 名誉教授 (60029105)

Co-Investigator(Kenkyū-buntansha) 山本 剛久  東京大学, 新領域創成科学研究科, 助教授 (20220478)
那須 三郎  大阪大学, 基礎工学研究科, 教授 (00030057)
森永 正彦  名古屋大学, 工学研究科, 教授 (50126950)
松原 英一郎  東北大学, 金属材料研究所, 教授 (90173864)
田中 功  京都大学, 工学研究科, 教授 (70183861)
佐久間 健人  東京大学, 新領域創成科学研究科, 教授 (50005500)
増本 健  電気磁気材料研究所, 所長 (20005854)
Project Period (FY) 2000 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥9,900,000 (Direct Cost: ¥9,900,000)
Fiscal Year 2004: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2002: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywords第一原理計算 / セラミックス / 酸化物 / 格子欠陥 / 原子空孔 / 粒界 / 表面 / 溶質元素 / 格子欠陷
Research Abstract

本総括班では,電子論に基づいた理論計算を永年に亘って行ってきた研究代表者の求心的なリーダーシップのもと,異なる基盤となる学問体系,所属分野や研究手法の異なった実験のエキスパートが集まり,局在量子構造の探求を通じた材料送製技術の構築という最終目標を目指してきたが,その結果,旧来の学問体系に横断的な形で共通の言語を獲得し,新しい材料開発のブレークするーに繋がるような新しい萌芽が幾つも確認できた.本領域を構成する5つの計画研究班と連携して,以下の3つに研究テーマを絞り,班の壁を越えて複合観点からの複合手法での研究を行った.
【酸化物中のドーパントと空孔のつくる局在量子構造の研究】では,酸化物中の効果的なドーパントの探索には,本研究で開発した理論計算法が極めて有効であることが結論でき,これは新しい材料機能創出技術として応用可能であり,新しい材料開発において,第一原理計算による陽電子寿命計算法と陽電子寿命測定実験との組み合わせも,他の方法では得がたい重要な情報を与えるツールとなった.
【X線吸収スペクトルおよび電子エネルギー損失分光による酸化物への微量ドーパントの局在量子構造の研究】では,ZANESとELNESを定量的に再現できる理論計算法手法を開発し,分光法を材料開発に応用するための大きなステップとなった.
【酸化亜鉛界面のつくる高在量子構造の研究】では,第一原理計算と人工粒界を用いたモデル実験により,非直線電気特性を発現する量子構造は界面における原子配列の乱れではなく,界面に存在する点欠陥間の相互作用によって形成されることが示された.このように界面機能の本質となる界面局在量子構造の起源を明らかにした成果は,ZnOのみならず他のセラミック,半導体材料において高機能を有する界面の設計を行うための重要な指針となることが期待される.

Report

(5 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (24 results)

All 2005 2004 Other

All Journal Article (6 results) Publications (18 results)

  • [Journal Article] General rule for displacive phase transitions in perovskite compounds revisited by first principles calculations2005

    • Author(s)
      I.Tanaka et al.
    • Journal Title

      Phys.Rev.Lett. 94

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Ab initio lattice dynamics and phase transformations of ZrO_22005

    • Author(s)
      I.Tanaka et al.
    • Journal Title

      Phys.Rev.B 71

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The formation of a rock-salt type ZnO thin film by low-level alloying with MgO2004

    • Author(s)
      I.Tanaka et al.
    • Journal Title

      J.Phys.-Condes.Matter. 16

      Pages: 3801-3806

    • Related Report
      2004 Annual Research Report
  • [Journal Article] First principles calculation of defect formation energies in Sr - and Mg-doped LaGaO_32004

    • Author(s)
      T.Yamamoto et al.
    • Journal Title

      J.Phys.Chem.B 108

      Pages: 9168-9172

    • Related Report
      2004 Annual Research Report
  • [Journal Article] X-ray absorption near edge structures of silicon nitride thin film by pulsed laser deposition2004

    • Author(s)
      I.Tanaka et al.
    • Journal Title

      Mater.Trans. 45

      Pages: 2039-2041

    • NAID

      10013336406

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Electronic states of sulfur doped TiO_2 by first principles calculations2004

    • Author(s)
      T.Yamamoto et al.
    • Journal Title

      Mater.Trans. 45

      Pages: 1987-1990

    • Related Report
      2004 Annual Research Report
  • [Publications] M.Yoshino: "Energetics of Hydrogen States in SrZnO3"Mater.Trans.. 43. 1444-1450 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] F.Oba: "First-Principles Calculations of Co Impurities and Native Defects in ZnO"Mater.Trans.. 43. 1439-1443 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Koyama: "Evaluation of Migration Energy of Lithium Ions in Chalcogenides and Halides by First Principles Calculation"Mater.Trans.. 43. 1460-1463 (2002)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Yoshino: "Energetics of Hydrogen States in SrZrO3"Mater. Trans.. 43. 1444-1450 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] F.Oba: "First-Principles Calculations of Co Impurities and Native Defects in ZnO"Mater. Trans.. 43. 1439-1443 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Koyama: "Evaluation of Migration Energy of Lithium Ions in Chalcogenides and Halides by First Principles Calculation"Mater. Trans.. 43. 1460-1463 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] W-Y.Ching: "Prediction of new spinel phase of Ti3N4 and SiTi_2N_4 and metal-insulator transition"Phys. Rev. B. 61. 10609-10614 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] F.Oba: "Energetics and electronic structure of point defects associated with oxygen excess at a tilt boundary of ZnO"J. Mater. Res.. 15. 2167-2175 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Yoshiya: "Energetical role of modeled intergranular glassy film in Si_3Y_4-SiO_2 ceramics"Acta Mater.. 48. 4641-4645 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] F.Oba: "Ab initio study of symmetric tilt boundaries in ZnO"Phys. Rev. B. 63. 015410 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] W-Y.Ching: "Prediction of spinel structure and properties of single and double nitrides"Phys. Rev. B. 63. 064102 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ogasawara: "Relativistic cluster calculation of ligand-field multiplet effects on cation L_<2,3> x-ray absorption edges of SrTiO_3, NiO and CaF_2"Phys. Rev. B. 64. 115413,1-115413,5 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Mizoguchi: "Core-hole effects on theoretical ELNES/NEXAFS of MgO"Phys.Rev.B. 61. 2180-2187 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] W-Y.Ching: "Prediction of new spinel phase of Ti3N4 and SiTi_2N_4 and metal-insulator transition"Phys.Rev.B. 61. 10609-10614 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] F.Oba: "Energetics and electronic structure of point defects associated with oxygen excess at a tilt boundary of ZnO"J.Mater.Res.. 15. 2167-2175 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Yoshiya: "Energetical role of modeled intergranular glassy film in Si_3N_4-SiO_2 ceramics"Acta Mater. 48. 4641-4645 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] F.Oba: "Ab initio study of symmetric tilt boundaries in ZnO"Phy.Rev.B.. 63. 015410 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] W.Y.Ching: "Prediction of spinel structure and properties of single and double nitrides"Phys.Rev.B. 63. 064102 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2018-03-28  

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