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Materials design of two-dimensional octet AB compounds by bond engineering

Research Project

Project/Area Number 20K05324
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionMie University

Principal Investigator

Akiyama Toru  三重大学, 工学研究科, 准教授 (40362363)

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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords原子層物質 / 2層ハニカム構造 / ヤヌス型原子層 / 格子不整合度 / 遷移金属ダイカルコゲナイド / 混晶 / グラフェン / vdWヘテロ構造 / 第一原理計算 / 二層ハニカム構造 / トポロジカル絶縁体 / オクテットAB型化合物
Outline of Research at the Start

近年、III-V族化合物半導体において原子層物質の形成が報告されそのデバイス応用が注目されている。本研究課題では、III-V族化合物半導体やII-VI族化合物半導体に代表されるオクテットAB型二元系材料における原子層物質の形成可能性を第一原理計算等の量子論的アプローチにより解明することを目的とする。また、これら既存の材料を用いた新規原子層物質およびその超格子構造における物性制御可能性およびトポロジカル物質としての特異な電子状態の出現可能性を見極めることも目的とする。

Outline of Final Research Achievements

We performed first-principles calculations for AB-type binary compound using various structures including double-layer honeycomb (DLHC) structure and Haeckelite structure in addition to most stable structures in bulk phase. We found that the DLHC structure is the most stable when the film thickness is small. We also evaluated the formation of heterostructures containing AB-type binary materials with graphene and hexagonal BN. We revealed that the DLHC structure is stable for AB-type binary materials that proposed new type heterostructures composed of DLHC structure. Furthermore, we found that Janus monolayer can be formed for AB-type binary compound with DLHC structure.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果によって、オクテットAB型二元系材料による新たなバンドエンジニアリングの実現と新物質創製および新規物性の提案がなされた。これらの成果は、原子層新物質によるハンドエンジニアリング、スピントロニクス等へと発展する可能性が高く、これら各研究分野におけるデバイス開発および素子応用へと波及していくことが考えられる。また、本研究課題の成果は原子層エレクトロニクスの学理の構築に寄与しており、原子層科学ならびにナノ構造科学の進展に大きく貢献する意義がある。

Report

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

    (59 results)

All 2023 2022 2021 2020

All Journal Article (25 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 25 results,  Open Access: 2 results) Presentation (34 results) (of which Int'l Joint Research: 15 results,  Invited: 3 results)

  • [Journal Article] Epitaxial Junction of Inversion Symmetry Breaking AlN and Centrosymmetric NbN: A Polarity Control of Wide-Bandgap AlN2023

    • Author(s)
      Kobayashi Atsushi、Kihira Shunya、Akiyama Toru、Kawamura Takahiro、Maeda Takuya、Ueno Kohei、Fujioka Hiroshi
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 5 Issue: 1 Pages: 240-246

    • DOI

      10.1021/acsaelm.2c01288

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of lattice constraint on structural stability and miscibility of (AlxGa1-x)2O3 films: a first-principles study2023

    • Author(s)
      Fujita Shuri、Akiyama Toru、Kawamura Takahiro、Ito Tomonori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SC Pages: SC1031-SC1031

    • DOI

      10.35848/1347-4065/acae5f

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bandgap Change in Short‐Period InN/AlN Superlattices Induced by Lattice Strain2023

    • Author(s)
      Kawamura Takahiro、Basaki Kouhei、Korei Akito、Akiyama Toru、Kangawa Yoshihiro
    • Journal Title

      physica status solidi (b)

      Volume: 260 Issue: 8 Pages: 2200549-2200549

    • DOI

      10.1002/pssb.202200549

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Role of charged oxygen vacancies and substrate lattice constraint on structural stability of Ga<sub>2</sub>O<sub>3</sub> polymorphs2023

    • Author(s)
      Akiyama Toru、Kawamura Takahiro、Ito Tomonori
    • Journal Title

      Applied Physics Express

      Volume: 16 Issue: 1 Pages: 015508-015508

    • DOI

      10.35848/1882-0786/acb12e

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] First-principles study for self-limiting growth of GaN layers on AlN(0001) surface2023

    • Author(s)
      Sokudo Haruka、Akiyama Toru、Ito Tomonori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: SC Pages: SC1014-SC1014

    • DOI

      10.35848/1347-4065/aca810

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of oxygen-related defects on the electronic structure of GaN2022

    • Author(s)
      Ohata Satoshi、Kawamura Takahiro、Akiyama Toru、Usami Shigeyoshi、Imanishi Masayuki、Yoshimura Masashi、Mori Yusuke、Sumi Tomoaki、Takino Junichi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 6 Pages: 061004-061004

    • DOI

      10.35848/1347-4065/ac6645

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structures and stability of GaN/Ga2O3 interfaces: a first-principles study2022

    • Author(s)
      Hishiki Fumiaki、Akiyama Toru、Kawamura Takahiro、ITO Tomonori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 6 Pages: 065501-065501

    • DOI

      10.35848/1347-4065/ac5e90

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reaction of nitrous oxide and ammonia molecules at 4H-SiC/SiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.svg"><mml:msub><mml:mrow /><mml:mn>2</mml:mn></mml:msub></mml:math> interface: An ab initio study2022

    • Author(s)
      Akiyama Toru、Shimizu Tsunashi、Ito Tomonori、Kageshima Hiroyuki、Shiraishi Kenji
    • Journal Title

      Surface Science

      Volume: 723 Pages: 122102-122102

    • DOI

      10.1016/j.susc.2022.122102

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An ab initio-based approach for the formation of pyramidal inversion domain boundaries in highly Mg-doped GaN2022

    • Author(s)
      Niki Katsuhide、Akiyama Toru、Ito Tomonori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: 5 Pages: 055503-055503

    • DOI

      10.35848/1347-4065/ac5dab

    • Related Report
      2022 Annual Research Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ab initio study for orientation dependence of nitrogen incorporation at 4H-SiC/SiO<sub>2</sub> interfaces2022

    • Author(s)
      Akiyama Toru、Shimizu Tsunashi、Ito Tomonori、Kageshima Hiroyuki、Chokawa Kenta、Shiraishi Kenji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SH Pages: SH1002-SH1002

    • DOI

      10.35848/1347-4065/ac5a96

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of surface structural change on adsorption behavior on InAs wetting layer surface grown on GaAs(001) substrate2021

    • Author(s)
      Akiyama Toru、Yonemoto Kazuhiro、Hishiki Fumiaki、Ito Tomonori
    • Journal Title

      Journal of Crystal Growth

      Volume: 570 Pages: 126233-126233

    • DOI

      10.1016/j.jcrysgro.2021.126233

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of step edges on the adsorption behavior on vicinal AlN(0001) surface during metal-organic vapor phase epitaxy: An ab initio study2021

    • Author(s)
      Akiyama Toru、Ohka Takumi、Nagai Katsuya、Ito Tomonori
    • Journal Title

      Journal of Crystal Growth

      Volume: 571 Pages: 126244-126244

    • DOI

      10.1016/j.jcrysgro.2021.126244

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effective approach for calculating individual energy of step edges on polar AlN(0001) and GaN(0001) surfaces2021

    • Author(s)
      Akiyama Toru、Nakatani Atsutaka、Shimizu Tsunashi、Ohka Takumi、Ito Tomonori
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: 8 Pages: 080701-080701

    • DOI

      10.35848/1347-4065/ac1128

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ab initio-based approach for the oxidation mechanisms at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>SiO</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>/4H-SiC interface: Interplay of dry and wet oxidants during interfacial reaction2021

    • Author(s)
      Shimizu Tsunashi、Akiyama Toru、Ito Tomonori、Kageshima Hiroyuki、Uematsu Masashi、Shiraishi Kenji
    • Journal Title

      Physical Review Materials

      Volume: 5 Issue: 11 Pages: 114601-114601

    • DOI

      10.1103/physrevmaterials.5.114601

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Computational discovery of stable phases of graphene and h-BN van der Waals heterostructures composed of group III-V binary compounds2021

    • Author(s)
      Akiyama Toru、Kawamura Takahiro、Ito Tomonori
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 2 Pages: 023101-023101

    • DOI

      10.1063/5.0032452

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Reaction of NO molecule at 4H-SiC/SiO2 interface: an ab initio study for the effect of NO annealing after dry oxidation2021

    • Author(s)
      Shimizu Tsunashi、Akiyama Toru、Nakamura Kohji、Ito Tomonori、Kageshima Hiroyuki、Uematsu Masashi、Shiraishi Kenji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 60 Issue: SB Pages: SBBD10-SBBD10

    • DOI

      10.35848/1347-4065/abdcb1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of Step Edges on Adsorption Behavior for GaN(0001) Surfaces during Metalorganic Vapor Phase Epitaxy: AnAb InitioStudy2020

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

      Crystal Growth & Design

      Volume: 20 Issue: 7 Pages: 4358-4365

    • DOI

      10.1021/acs.cgd.0c00117

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Roles of growth kinetics on GaN non-planar facets under metalorganic vapor phase epitaxy condition2020

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

      Applied Physics Express

      Volume: 13 Issue: 6 Pages: 065505-065505

    • DOI

      10.35848/1882-0786/ab9182

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ab initio calculations for the effect of wet oxidation condition on the reaction mechanism at 4H-SiC/SiO2 interface2020

    • Author(s)
      Shimizu Tsunashi、Akiyama Toru、Pradipto Abdul-Muizz、Nakamura Kohji、Ito Tomonori、Kageshima Hiroyuki、Uematsu Masashi、Shiraishi Kenji
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SM Pages: SMMD01-SMMD01

    • DOI

      10.35848/1347-4065/ab85dd

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Equilibrium Morphologies of Faceted GaN under the Metalorganic Vapor‐Phase Epitaxy Condition: Wulff Construction Using Absolute Surface Energies2020

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

      physica status solidi (b)

      Volume: 257 Issue: 4 Pages: 1900523-1900523

    • DOI

      10.1002/pssb.201900523

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of Film Thickness on Structural Stability for BAlN and BGaN Alloys: Bond‐Order Interatomic Potential Calculations2020

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

      physica status solidi (b)

      Volume: 257 Issue: 8 Pages: 2000205-2000205

    • DOI

      10.1002/pssb.202000205

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Absolute surface energies of oxygen-adsorbed GaN surfaces2020

    • Author(s)
      Kawamura Takahiro、Akiyama Toru、Kitamoto Akira、Imanishi Masayuki、Yoshimura Masashi、Mori Yusuke、Morikawa Yoshitada、Kangawa Yoshihiro、Kakimoto Koichi
    • Journal Title

      Journal of Crystal Growth

      Volume: 549 Pages: 125868-125868

    • DOI

      10.1016/j.jcrysgro.2020.125868

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] First‐Principles Calculation of Bandgaps of Al1- xInxN Alloys and Short‐Period Al1-xInxN/Al1-yInyN Superlattices2020

    • Author(s)
      Kawamura Takahiro、Fujita Yuma、Hamaji Yuya、Akiyama Toru、Kangawa Yoshihiro、Gorczyca Izabela、Suski Tadeusz、Wierzbowska Maigorzata, Krukowski Stanisiaw
    • Journal Title

      physica status solidi (b)

      Volume: 257 Issue: 4 Pages: 1900530-1900530

    • DOI

      10.1002/pssb.201900530

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effects of Wet Ambient on Dry Oxidation Processes at 4H-SiC/SiO2 Interface: An Ab Initio Study2020

    • Author(s)
      Shimizu Tsunashi、Akiyama Toru、Nakamura Kohji、Ito Tomonori、Kageshima Hiroyuki、Uematsu Masashi、Shiraishi Kenji
    • Journal Title

      ECS Transactions

      Volume: 98 Issue: 3 Pages: 37-46

    • DOI

      10.1149/09803.0037ecst

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A Simple Approach to Growth Mode of InN and InGaN Thin Films on GaN(0001) Substrate2020

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

      ECS Transactions

      Volume: 98 Issue: 6 Pages: 155-164

    • DOI

      10.1149/09806.0155ecst

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] AlNに格子整合する六方晶Nb2N超伝導体のエピタキシャル成長2023

    • Author(s)
      小林篤, 紀平俊矢, 武田崇仁, 小林正起, 秋山亨, 河村貴宏, 原田尚之, 上野耕平, 藤岡洋
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] キンクおよびステップを含むAlN(0001)表面の構造安定性および吸着・脱離の挙動に関する理論的検討2023

    • Author(s)
      秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      2023年第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 4H-SiC/SiO2界面におけるバンド配列の面方位依存性に関する理論検討2023

    • Author(s)
      松田隼, 秋山亨, 畠山哲夫, 白石賢二, 中山隆史
    • Organizer
      2023年第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] α-Ga2O3/Al2O3超格子のバンド構造解析2023

    • Author(s)
      河村貴宏, 伊藤智徳, 秋山亨
    • Organizer
      2023年第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] First-principles study for self-limiting growth of GaN layers on AlN(0001) surface2022

    • Author(s)
      Haruka Sokudo, Toru Akiyama, and Tomonori Ito
    • Organizer
      2022 International Conference on Solid State Devices and Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of lattice constraint on structural stability and miscibility of (AlxGa1-x)2O3 films: A first-principles study2022

    • Author(s)
      Shuri Fujita, Toru Akiyama, Takahiro Kawamura, and Tomonori Ito
    • Organizer
      2022 International Conference on Solid State Devices and Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural change of Ga2O3 induced by charged oxygen vacancies: a first-principles study2022

    • Author(s)
      Toru Akiyama, Takahiro Kawamura, Tomonori Ito
    • Organizer
      The 4th International Workshop on Gallium Oxide and Related Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of biaxial strain on bandgaps of β-Ga2O32022

    • Author(s)
      Takahiro Kawamura, Toru Akiyama
    • Organizer
      The 4th International Workshop on Gallium Oxide and Related Materials
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 2軸歪みによるβ-Ga2O3のバンドギャップ変化2022

    • Author(s)
      河村貴宏, 秋山亨
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ga2O3の構造安定性に対する酸素空孔の影響に関する理論的検討2022

    • Author(s)
      秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      2022年第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] キンクおよびステップを含むAlN(0001)表面の構造安定性に関する理論的検討2022

    • Author(s)
      秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      第51回結晶成長国内会議
    • Related Report
      2022 Annual Research Report
  • [Presentation] Ab initio-based approach for reaction process at 4H-SiC/SiO2 interfaces2022

    • Author(s)
      Toru Akiyama, T. Shimizu, Tomonori Ito, H. Kageshima, K. Shiraishi
    • Organizer
      2nd International Symposium on Wide Gap Semiconductor Growth, Process and Device Simulation
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 窒化物半導体におけるピラミッド型インバージョンドメイン形成の理論解析2022

    • Author(s)
      仁木克英, 秋山亨, 伊藤智徳
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] GaN(0001)基板上に形成するGa2O3膜の構造安定性の理論解析: 膜厚依存性の検討2022

    • Author(s)
      日紫喜文昭, 秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] (AlxGa1-x)2O3混晶の構造安定性および混和性に関する理論的検討2022

    • Author(s)
      藤田楓理, 秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 第一原理計算に基づくAlN(0001)表面上のGaN層の構造安定性評価2022

    • Author(s)
      足道悠, 秋山亨, 伊藤智徳
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 4H-SiC/SiO2界面での窒素酸化物およびアンモニアの反応機構の理論的検討2022

    • Author(s)
      秋山亨, 清水紀志, 伊藤智徳, 影嶋博之, 白石賢二
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 4H-SiC/SiO2界面での窒素酸化物およびアンモニアの反応機構の理論的検討2022

    • Author(s)
      秋山亨, 清水紀志, 伊藤智徳, 影島博之, 白石賢二
    • Organizer
      電子デバイス界面テクノロジー研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] First-principles calculation of optical properties of III-V nitride semiconductors2022

    • Author(s)
      Takahiro Kawamura, Kouhei Basaki, Satoshi Ohata, Toru Akiyama, and Yoshihiro Kangawa
    • Organizer
      The 2nd International Symposium on Wide Gap Semiconductor Growth, Process and Device Simulation
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Structures and stability of GaN/Ga2O3 interfaces: a first-principles Study2021

    • Author(s)
      Fumiaki Hishiki, Toru Akiyama, Takahiro Kawamura, and Tomonori Ito
    • Organizer
      2021 International Conference on Solid State Devices and Materials
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] An ab initio-based approach for the formation of pyramidal inversion domain boundaries in highly Mg-doped GaN2021

    • Author(s)
      Katsuhide Niki, Toru Akiyama, and Tomonori Ito
    • Organizer
      2021 International Conference on Solid State Devices and Materials
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Direct approach for calculating individual energy of step edges on polar AlN(0001) and GaN(0001) surfaces using density functional calculations2021

    • Author(s)
      Toru Akiyama, Atsutaka Nakatani, Tsunashi Shimizu, Takumi Ohka, Tomonori Ito
    • Organizer
      International Conference on Materials and Systems for Sustainability
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ab initio Study for Orientation Dependence of Nitrogen Incorporation at 4H-SiC/SiO2 Interfaces2021

    • Author(s)
      Toru Akiyama, Tsunashi Shimizu, Tomonori Ito, Hiroyuki Kageshima, Kenta Chokawa, Kenji Shiraishi
    • Organizer
      2021 International Workshop on “Dielectric Thin Films for Future ULSI Devices: Science and Technology
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 第一原理計算によるGaN/β-Ga2O3界面構造の理論解析2021

    • Author(s)
      日紫喜文昭, 秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 界面エネルギー計算に基づく高濃度Mg添加GaNにおけるピラミッド型インバージョンドメイン形成の評価2021

    • Author(s)
      仁木克英, 秋山亨, 伊藤智徳
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 第一原理計算によるAlN(0001)およびGaN(0001)表面でのステップ形成エネルギーの評価2021

    • Author(s)
      秋山亨, 中谷淳嵩, 清水紀志, 相可拓巳, 伊藤智徳
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 4H-SiC/SiO2界面での窒素取り込みの面方位依存性に関する理論検討2021

    • Author(s)
      秋山亨, 清水紀志, 伊藤智徳, 影嶋博之, 白石賢二
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] 第一原理計算によるIII-V族化合物-グラフェン超格子の構造および電子状態解析2021

    • Author(s)
      秋山亨, 河村貴宏, 伊藤智徳
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] Recent progress in computational materials science for III-nitride epitaxial growth: effects of growth kinetics on surface morphologies and nanostructures2021

    • Author(s)
      Toru Akiyama, Yuki Seta, Takumi Ohka, Tomonori Ito
    • Organizer
      International Symposium on Wide Gap Semiconductor Growth, Process and Device Simulation 2021
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Change of the effective bandgaps of InN/AlN superlattices due to lattice distortion2021

    • Author(s)
      Takahiro Kawamura, Akito Korei, Kouhei Basaki, Toru Akiyama, Yoshihiro Kangawa, Izabela Gorczyca, Tadeusz Suski, Maigorzata Wierzbowska, and Stanisiaw Krukowski
    • Organizer
      International Symposium on Wide Gap Semiconductor Growth, Process and Device Simulation 2021
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Effect of step edges on the adsorption behavior on vicinal AlN(0001) surface during metal-organic vapor phase epitaxy: an ab initio study2021

    • Author(s)
      Toru Akiyama, Takumi Ohka, Katsuya Nagai, Tomonori Ito
    • Organizer
      The 8th Asian Conference on Crystal Growth and Crystal Technology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Influence of Lattice Distortion on the Effective Bandgaps of Polar InN/AlN Superlattices2021

    • Author(s)
      Influence of LatticeKouhei Basaki, Akito Korei, Takahiro Kawamura, Toru Akiyama, Yoshihiro Kangawa
    • Organizer
      The 8th Asian Conference on Crystal Growth and Crystal Technology
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Computational prediction for stable structures of graphene van der Waals heterostructures composed of group-III-V compounds2020

    • Author(s)
      T. Akiyama, K. Nakamura, T. Ito
    • Organizer
      Pacific Rim Meeting on Electrochemical and Solid State Science
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] モンテカルロ計算によるGaAs(001)基板上InAsぬれ層の表面構造変化の理論検討2020

    • Author(s)
      秋山亨, 米本和弘, 日紫喜文昭, A. -M. Pradipto, 中村浩次, 伊藤智徳
    • Organizer
      2020年第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Research-status Report

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

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