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Design and property prediction of post-graphene thin-film materials based on first-principles electronic-state calculation

Research Project

Project/Area Number 20K05274
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionKyoto University of Advanced Science

Principal Investigator

Nakamura Koichi  京都先端科学大学, 工学部, 教授 (20314239)

Co-Investigator(Kenkyū-buntansha) 羽部 哲朗  京都先端科学大学, ナガモリアクチュエータ研究所, 助教 (60737435)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywordsポストグラフェン / 遷移金属ダイカルコゲナイド / 第一原理計算 / 時間依存密度汎関数理論 / 光学物性 / 光伝導性
Outline of Research at the Start

非炭素系単体二次元材料と遷移金属ダイカルコゲナイドを中心に種々のポストグラフェン材料の電子構造の詳細を精密な電子状態計算により明らかにし、構成元素の周期や族との関連を定性的・定量的に解析するとともに、得られた電子構造に基づいてポストグラフェン材料の諸物性を予測することを目的に、下記の研究を行う。
A. 非経験的電子状態計算に基づく光伝導性シミュレーション手法の創出
B. ポストグラフェン材料モデルの電子状態計算と電子物性シミュレーション
C. 機械学習によるポストグラフェン材料ヘテロ接合構造の設計と特性予測

Outline of Final Research Achievements

The electronic structures including their excited states in various post-graphene materials such as transition metal dichalcogenides have been clarified by precise electronic structure calculations, and the relationships between the electronic structures and the periods or groups of the constituent elements have been qualitatively and quantitatively analyzed.
Time-dependent density functional theory was introduced to calculate the electronic excited states, and simulations were carried out for photoconductivity, dielectric function, I-V characteristics, piezoresistivity, piezooptical property, and thermoelectricity based on the electronic-state calculations. Theoretical indicators were provided for the fabrication policy of heterojunction structures and expected novel functions of post-graphene materials, and guidelines for the development of high-performance 2D materials with excellent electronic properties were presented.

Academic Significance and Societal Importance of the Research Achievements

ホーエンベルク・コーンの定理に基づく密度汎関数法は電子基底状態で成立する手法であり、価電子帯のエネルギーやバンドギャップが過小評価される等、電子励起状態に基づく材料特性の予測シミュレーションにはに対応できなかったが、材料系において時間依存密度汎関数法による電子状態計算を導入し、適正な電子励起状態のエネルギーバンドやコーン・シャム波動関数から材料物性を予測する手法の開発について先鞭をつけた。
本研究で開発されたシミュレーション手法は、電子励起状態への遷移を伴う材料物性を利用した小型デバイス等を開発する際における材料選択に活用できる。

Report

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

    (13 results)

All 2022 2021 2020 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [Journal Article] Intrinsic spin-valley locking for conducting electrons in metal-semiconductor-metal lateral heterostructures of 1H-transition-metal dichalcogenides2022

    • Author(s)
      Tetsuro Habe
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 11

    • DOI

      10.1103/physrevb.105.115401

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spontaneous spin-valley polarization in NbSe2 at a van der Waals interface2022

    • Author(s)
      Matsuoka Hideki、Habe Tetsuro、Iwasa Yoshihiro、Koshino Mikito、Nakano Masaki
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 5129-5129

    • DOI

      10.1038/s41467-022-32810-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Optical conductivity of the threefold Hopf semimetal2022

    • Author(s)
      Tetsuro Habe
    • Journal Title

      Physical Review B

      Volume: 106 Issue: 20

    • DOI

      10.1103/physrevb.106.205204

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Optical properties of monolayer, multilayer, and bulk BiI3 studied using time-dependent density functional theory2021

    • Author(s)
      Habe Tetsuro, Nakamura Koichi
    • Journal Title

      Physical Review B

      Volume: 103 Issue: 11

    • DOI

      10.1103/physrevb.103.115409

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 静的変形を加えた MoS2 における電子状態と 光学応答の変化に対する時間依存密度汎関数法を用いた理論解析2022

    • Author(s)
      羽部哲朗, 中村康一
    • Organizer
      第7回マルチスケール材料力学シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 1H-遷移金属ダイカルゴゲナイド 金属-半導体-金属面内接合におけるスピン-バレー結合2022

    • Author(s)
      羽部哲朗
    • Organizer
      日本物理学会 2022年年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 対称なバンド構造をもつ多重縮退ホップ半金属の光学伝導度2022

    • Author(s)
      羽部哲朗
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] First-Principles Simulation of Stability and Electronic Properties in Curved Sheet Structures of Transition Metal Dichalcogenides2022

    • Author(s)
      Koichi Nakamura
    • Organizer
      35th International Microprocesses and Nanotechnology Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 原子層材料BiI3の光学応答への積層の効果に関する時間依存密度汎関数理論をもちいた理論的研究2021

    • Author(s)
      羽部哲朗、中村康一
    • Organizer
      第6回マルチスケール材料力学シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 電子励起状態計算による低次元ナノ材料光物性の力学応答解析2021

    • Author(s)
      羽部哲朗、中村康一
    • Organizer
      第15回分子科学討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] 原子層材料BiI3の光学応答の層数依存性に関する理論的研究2021

    • Author(s)
      羽部哲朗、中村康一
    • Organizer
      日本物理学会 2021年度秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] First-Principles Simulation of Strain Response in Two-dimensional Silicon Carbide Nanolayers2020

    • Author(s)
      Koichi Nakamura
    • Organizer
      33rd International Microprocesses and Nanotechnology Conference (MNC 2020)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 「先生に聞いてみた」(大学ウェブページ)

    • URL

      https://www.kuas.ac.jp/interview/archives/269

    • Related Report
      2020 Research-status Report

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

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