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Bond engineering in quantum dot formation mechanism

Research Project

Project/Area Number 16K04962
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionMie University

Principal Investigator

Ito Tomonori  三重大学, 工学研究科, 教授 (80314136)

Co-Investigator(Kenkyū-buntansha) 秋山 亨  三重大学, 工学研究科, 准教授 (40362363)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords半導体量子ドット形成 / ヘテロエピタキシャル成長 / ぬれ層表面構造 / ひずみ緩和 / 格子不整合転位 / 成長様式 / 計算科学 / 半導体ヘテロエピタキシャル成長 / ぬれ層 / 量子ドット / 成長機構 / 表面・界面物性
Outline of Final Research Achievements

In this study, it is clarified that misfit dislocation formation energy Ed is crucial for understanding quantum dot (QD) formation in InAs/GaAs system. The larger the Ed, the more favorable quantum dot formation such as InAs/GaAs(001). On the other hand, the QD formation on InAs/GaAs(110) results from the reducing surface energy γ due to strain reducing layer insertion. Moreover, it is found that the surface reconstruction strongly affects the Ed values. Surface As-dimers on InAs/GaAs(001) suppress the strain relaxation near the surface to increase Ed, while In-vacancy on InAs/GaAs(111)A effectively reduces the surface strain to lower the Ed realizing two-dimensional growth. These new findings can give physical insight and are feasible for understanding QD formation in various heteroepitaxial systems.

Academic Significance and Societal Importance of the Research Achievements

スマートフォンやLEDに用いられている半導体材料は,情報・環境分野における次世代デバイス開発においても重要な役割を果たすことが期待されている。特に半導体薄膜成長により形成される量子ドット(直径20 nm程度のナノ構造)は,発光デバイスのみならず量子情報通信技術に不可欠な単一光子発生源用材料としても注目されている。本研究ではInAs/GaAs系を対象に,半導体薄膜成長過程での量子ドット形成機構を検討し,界面転位形成のエネルギーEdと表面形成のエネルギーγが量子ドット形成の支配因子であることを明らかにした。この新知見は,さまざまな材料系での量子ドット形成に有用な指針をあたえるものである。

Report

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

    (30 results)

All 2019 2018 2017 2016

All Journal Article (10 results) (of which Peer Reviewed: 10 results,  Acknowledgement Compliant: 4 results,  Open Access: 2 results) Presentation (18 results) (of which Int'l Joint Research: 11 results,  Invited: 6 results) Book (2 results)

  • [Journal Article] Growth mode in heteroepitaxial system from nano- and macro-theoretical viewpoints2019

    • Author(s)
      Ito Tomonori, Akiyama Toru, Nakamura Kohji
    • Journal Title

      Journal of Crystal Growth

      Volume: 512 Pages: 41-46

    • DOI

      10.1016/j.jcrysgro.2019.01.028

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical Investigations for Surface Reconstructions of Submonolayer InAs Grown on GaAs(001)2018

    • Author(s)
      Ito Tomonori、Akiyama Toru、Nakamura Kohji、Pradipto Abdul-Muizz
    • Journal Title

      physica status solidi (a)

      Volume: 216 Pages: 1800476-1800476

    • DOI

      10.1002/pssa.201800476

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical Investigations for Strain Relaxation and Growth Mode of InAs Thin Layers on GaAs(110)2017

    • Author(s)
      Ito Tomonori、Akiyama Toru、Nakamura Kohji
    • Journal Title

      Physica Satus Solidi B

      Volume: 印刷中 Issue: 4 Pages: 1700241-1700241

    • DOI

      10.1002/pssb.201700241

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical study for misfit dislocation formation at InAs/GaAs(001) interface2017

    • Author(s)
      Kaida Ryo、Akiyama Toru、Nakamura Kohji、Ito Tomonori
    • Journal Title

      Journal Crystal Growth

      Volume: 468 Pages: 919-922

    • DOI

      10.1016/j.jcrysgro.2016.10.064

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ab initio-based approach to novel behavior in semiconductor hetero-epitaxial growth2017

    • Author(s)
      Ito Tomonori、Akiyama Toru、Nakamura Kohji
    • Journal Title

      Journal Crystal Growth

      Volume: 477 Pages: 12-18

    • DOI

      10.1016/j.jcrysgro.2017.03.010

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Atomistic behaviour of (n ×3)-reconstructed areas of InAs-GaAs(001) surface at the growth condition2017

    • Author(s)
      Konishi Tomoya、Tsukamoto Shiro、Ito Tomonoroi、Akiyama Toru、Kaida Ryo
    • Journal Title

      Journal Crystal Growth

      Volume: 477 Pages: 104-109

    • DOI

      10.1016/j.jcrysgro.2017.01.009

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Recent Progress in Computational Materials Science for Semiconductor Epitaxial Growth2017

    • Author(s)
      T. Ito and T. Akiyama
    • Journal Title

      Crystals

      Volume: 7 Issue: 2 Pages: 46-46

    • DOI

      10.3390/cryst7020046

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Structures and stability of polar GaN thin films on ScAlMgO4 substrate: An ab initio-based study2017

    • Author(s)
      H. Nakane, T. Akiyama, K. Nakamura, and T. Ito
    • Journal Title

      Journal of Crystal Growth

      Volume: 印刷中 Pages: 93-96

    • DOI

      10.1016/j.jcrysgro.2016.09.019

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Effective approach for accurately calculating individual energy for polar heterojunction interfaces2016

    • Author(s)
      Toru Akiyama, Harunobu Nakane, Kohji Nakamura, Tomonori Ito
    • Journal Title

      Physical Review B

      Volume: 94

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Theoretical investigations for strain relaxation and growth mode of InAs thin layers on GaAs(111)A2016

    • Author(s)
      Tomonori Ito, Toru Akiyama, Kohji Nakamura
    • Journal Title

      Condensed Matter

      Volume: 1 Issue: 1 Pages: 4-4

    • DOI

      10.3390/condmat1010004

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Theoretical investigations for surface reconstructions of submonolayer InAs grown on GaAs(001)2018

    • Author(s)
      Tomonori Ito, Toru Akiyama, Kohji Nakamura, Abdul-Muizz Pradipto
    • Organizer
      The 45th International Symposium on Compound Semiconductors
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth mode in heteroepitaxial system from nano- and macro-theoretical viewpoints2018

    • Author(s)
      Tomonori Ito
    • Organizer
      The 20th International Conference on Molecular Beam Epitaxy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent progress in computational material science for growth of nitride semiconductors I2018

    • Author(s)
      Tomonori Ito
    • Organizer
      4th International Discussion on Growth of Nitride Semiconductors
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 計算科学で見るGaNエピタキシャル成長2018

    • Author(s)
      伊藤智徳
    • Organizer
      2018年秋季第79回応用物理学会学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Theoretical investigations for strain relaxation and resultant growth mode in InAs/Gas heteroepitaxial system2018

    • Author(s)
      Tomonori Ito, Toru Akiyama, Kohji Nakamura
    • Organizer
      45th Conference on the Physics and Chemistry of Surfaces and Interfaces
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] InAs/GaAs(110)系におけるひずみ緩和と成長様式に関する理論検討2017

    • Author(s)
      伊藤智徳,海田諒,秋山亨,中村浩次
    • Organizer
      2017年第64回応用物理学会春季学術講演会
    • Place of Presentation
      パシフィコ横浜(神奈川県・横浜市)
    • Year and Date
      2017-03-14
    • Related Report
      2016 Research-status Report
  • [Presentation] Ab initio-based approach to adsorption of In atom with strain relaxation on InAs wetting layer surface grown on GaAs(001)2017

    • Author(s)
      Ryo Kaida, Toru Akiyama, Kohji Nakamura, Tomonori Ito
    • Organizer
      The 44th Conference on the Physics and Chemistry of Surfaces and Interfaces
    • Place of Presentation
      Santa Fe(USA)
    • Year and Date
      2017-01-15
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] A simple interpretation for heteroepitaxial growth mode in terms of surface and interface2017

    • Author(s)
      Tomonori Ito, Toru Akiyama, Kohji Nakamura
    • Organizer
      The 44th Conference on the Physics and Chemistry of Surfaces and Interfaces
    • Place of Presentation
      Santa Fe(USA)
    • Year and Date
      2017-01-15
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theoretical investigations for strain relaxation and growth mode of InAs thin layers on GaAs(110)2017

    • Author(s)
      Tomonori Ito, Toru Akiyama, Kohji Nakamura
    • Organizer
      44th International Symposium on Compound Semiconductors
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2次元成長,3次元成長を分ける成長メカニズム2017

    • Author(s)
      伊藤智徳
    • Organizer
      2017年秋季第78回応用物理学会学術講演会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 結晶成長条件下での窒化物半導体非極性表面構造の安定性2016

    • Author(s)
      伊藤智徳
    • Organizer
      2016年秋季第77回応用物理学会学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県・新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] InAs/GaAs(111)A系におけるひずみ緩和と成長様式に関する理論検討2016

    • Author(s)
      伊藤智徳,秋山亨,中村浩次
    • Organizer
      2016年秋季第77回応用物理学会学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県・新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Presentation] InAs/GaAs(001)系の表面エネルギーと成長様式に関する理論的検討2016

    • Author(s)
      海田諒,秋山亨,中村浩次,伊藤智徳
    • Organizer
      2016年秋季第77回応用物理学会学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県・新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Presentation] MBE成長中InAs-GaAs(001)表面における(n×3)再構成領域の変化2016

    • Author(s)
      小西智也,塚本史郎,伊藤智徳,秋山亨,海田諒
    • Organizer
      2016年秋季第77回応用物理学会学術講演会
    • Place of Presentation
      朱鷺メッセ(新潟県・新潟市)
    • Year and Date
      2016-09-13
    • Related Report
      2016 Research-status Report
  • [Presentation] Ab initio-based approach to novel behavior of hetero-epitaxial growth2016

    • Author(s)
      Tomonori Ito
    • Organizer
      The 19th International Conference on Molecular Beam Epitaxy
    • Place of Presentation
      Montpellier(France)
    • Year and Date
      2016-09-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Atomistic evolution of (n×3)-reconstructed areas of InAs-GaAs(001) surface during MBE growth2016

    • Author(s)
      Tomoya Konishi, Shiro Tsukamoto, Tomonori Ito, Toru Akiyama, Ryo Kaida
    • Organizer
      The 19th International Conference on Molecular Beam Epitaxy
    • Place of Presentation
      Montpellier(France)
    • Year and Date
      2016-09-04
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theoretical study for misfit dislocation formation at InAs/GaAs(001) interface2016

    • Author(s)
      Ryo Kaida, Toru Akiyama, Kohji Nakamura, Tomonori Ito
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy
    • Place of Presentation
      名古屋国際会議場(愛知県・名古屋市)
    • Year and Date
      2016-08-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Size evolution of (n×3) reconstructed domains on growing InAs-GaAs(001) surface2016

    • Author(s)
      Tomoya Konishi, Shiro Tsukamoto, Tomonori Ito, Toru Akiyama, Ryo Kaida
    • Organizer
      The 18th International Conference on Crystal Growth and Epitaxy
    • Place of Presentation
      名古屋国際会議場(愛知県・名古屋市)
    • Year and Date
      2016-08-07
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Book] Advances in Computer Simulation Studies and Crystal Growth2019

    • Author(s)
      Hiroki Nada, Tomonori Ito, Toru Akiyama他
    • Total Pages
      195
    • Publisher
      MDPI
    • ISBN
      9783038973560
    • Related Report
      2018 Annual Research Report
  • [Book] Epitaxial Growth of III-Nitride Compounds Computational Approach2018

    • Author(s)
      Toru Akiyama, Tomonori Ito, Yoshihiro Kangawa, Takashi Nakayama, Kenji Shiraishi
    • Total Pages
      223
    • Publisher
      Springer
    • ISBN
      9783319766409
    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2020-03-30  

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