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Theoretical study on optical responses of excitons in monolayer transition-metal dichalcogenides

Research Project

Project/Area Number 16K05391
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionHokkaido University

Principal Investigator

Suzuura Hidekatsu  北海道大学, 工学研究院, 准教授 (10282683)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords励起子 / 遮蔽効果 / 光学応答 / 層状物質 / 遷移金属ダイカルコゲナイド / 吸収スペクトル / 誘電関数 / ディラック電子系 / 光吸収 / 動的遮蔽 / 遷移金属カルコゲナイド
Outline of Final Research Achievements

Optical excitation in semiconductors generates electrons and holes and the Coulomb attraction causes formation of the electron-hole bound state what we call exciton. In a monolayer transition-metal dichalcogenide, the exciton plays a dominant role in its optical response because there is no dielectric environment giving rise to screening outside the two-dimensional electronic system. In this study, we have developed a theoretical method to evaluate the dynamical screening effect for excitons. We calculated exciton absorption spectra under several types of dielectric material such as organic solvents and compound semiconductor substrates and discussed the control of optical responses.

Academic Significance and Societal Importance of the Research Achievements

半導体中の励起子形成に対する動的遮蔽効果は光学応答に影響を及ぼす重要な問題と古くから認識されていたが,非線形固有値問題に帰着され十分な解析がなされていなかった.本研究では,励起子の固有状態を求めることなく,応答関数を直接計算することにより動的遮蔽を考慮した束縛エネルギーを評価する手法を開発し,層状物質の外部環境を制御することで光学応答の変調が可能であることを示した.動作波長の可変性を実現することで光学デバイスへの応用が広がると期待される.

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (12 results)

All 2020 2019 2018 2017 2016

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (9 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Excitonic enhancement of optical nonlinearities in perovskite CH3NH3PbCl3 single crystals2019

    • Author(s)
      K. Ohara, T. Yamada, H. Tahara, T. Aharen, H. Hirori, H. Suzuura, and Y. Kanemitsu
    • Journal Title

      Phys. Rev. Materials

      Volume: 3 Issue: 11 Pages: 111601-111601

    • DOI

      10.1103/physrevmaterials.3.111601

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Theory of Hall effect in two-dimensional giant Rashba systems2016

    • Author(s)
      Hidekatsu Suzuura, Tsuneya Ando
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 3

    • DOI

      10.1103/physrevb.94.035302

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Theory of magnetic response in two-dimensional giant Rashba system2016

    • Author(s)
      Hidekatsu Suzuura, Tsuneya Ando
    • Journal Title

      Physical Review B

      Volume: 94 Issue: 8

    • DOI

      10.1103/physrevb.94.085303

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 単層遷移金属ダイカルコゲナイドにおける静的遮蔽効果を取り入れた励起子吸収スペクトルの理論計算2020

    • Author(s)
      尾方幸博, 鈴浦秀勝
    • Organizer
      日本物理学会 第75回年次大会(2020年)
    • Related Report
      2019 Annual Research Report
  • [Presentation] MAPbCl3ペロブスカイト単結晶の励起子非線形光学応答2019

    • Author(s)
      小原慧一, 山田琢允, 田原弘量, 阿波連知子, 廣理英基, 鈴浦秀勝, 金光義彦
    • Organizer
      日本物理学会 2019年秋季大会, 岐阜大学
    • Related Report
      2019 Annual Research Report
  • [Presentation] MAPbI_3における温度効果を取り入れた励起子吸収スペクトル2019

    • Author(s)
      山本拓,西田寛太郎,鈴浦秀勝,秋山英文,金光義彦
    • Organizer
      日本物理学会 第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Theoretical study on the exciton absorption spectrum in organic-inorganic tri-halide perovskites2018

    • Author(s)
      T. Yamamoto, K. Nishida, H. Suzuura, H. Akiyama, Y. Kanemitsu
    • Organizer
      the 34th International Conference on the Physics of Semiconductors
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] ハロゲン化鉛ペロブスカイト半導体における励起子束縛状態の光吸 収スペクトルについての理論的考察2018

    • Author(s)
      山本拓,西田寛太郎,鈴浦秀勝,秋山英文,金光義彦
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 周波数依存した誘電率が励起子の束縛エネルギーと寿命に与える影響2017

    • Author(s)
      山本拓,西田寛太郎,鈴浦秀勝,秋山英文,金光義彦
    • Organizer
      日本物理学会 2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 遷移金属ダイカルコゲナイドにおける励起子束縛エネルギーに対する周波数依存した背景誘電率の影響2017

    • Author(s)
      西田寛太朗, 鈴浦秀勝
    • Organizer
      日本物理学会 第72回年次大会
    • Place of Presentation
      大阪大学 豊中キャンパス(豊中市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Effect of disorder on the magnetic susceptibility in a 2D system with Rashba spin-orbit coupling2016

    • Author(s)
      Hidekatsu Suzuura, Tsuneya Ando
    • Organizer
      9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids
    • Place of Presentation
      Kobe International Conference Center (神戸市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 励起子束縛エネルギーに対する周波数依存の背景誘電率の影響2016

    • Author(s)
      西田寛太朗, 鈴浦秀勝, 秋山英文
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学 角間キャンパス(金沢市)
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-02-19  

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