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Self-organized Formation of Ge-based Two-dimensional Crystals and Control of Crystalline Structure and Electronic State

Research Project

Project/Area Number 18K19020
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 29:Applied condensed matter physics and related fields
Research InstitutionNagoya University

Principal Investigator

Ohta Akio  名古屋大学, 工学研究科, 助教 (10553620)

Co-Investigator(Kenkyū-buntansha) 黒澤 昌志  名古屋大学, 工学研究科, 講師 (40715439)
洗平 昌晃  名古屋大学, 未来材料・システム研究所, 助教 (20537427)
Project Period (FY) 2018-06-29 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2018: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Keywordsゲルマニウム / 二次元結晶 / 表面偏析 / 電子状態 / ポストグラフェン / 電子物性 / ゲルマネニウム / ゲルマネン
Outline of Final Research Achievements

We have studied the chemical and crystallographic structures of vacuum evaporated Al/Ge(111) before and after the thermal annealing to form the germenium (Ge) two dimensional (2D) crystals on the surface by the control of Ge segregation from Al. Hetero-epitaxial Al layer was found to be grown on Ge(111) substrate by controls of the Al thickness and deposition rate during the vacuum evaporation, which Al surface becomes the template of crystallographic structure of segregated Ge layer. The surface flattening and Ge segregation on Al/Ge(111) structure by the annealing have been systematically investigated, and the sub-nm-thick ultrathin segragated-Ge crystalline can be formed on the hetero-epitaxial Al surface.

Academic Significance and Societal Importance of the Research Achievements

ポストグラフェン材料として注目されているGe原子の二次元結晶の形成は、これまでに清浄化した単結晶金属表面上へのGe原子の蒸着により行われてきた。これに対して、本研究では、Geと共晶反応を示すAl薄膜をGeウェハ上にヘテロエピタキシャル成長し、基板加熱や熱処理に伴うGe原子のAl薄層中への固溶と表面偏析を制御することで、サブナノメートルのGe結晶を成長できることを明らかにすることができた。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (17 results)

All 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (15 results) (of which Int'l Joint Research: 5 results,  Invited: 4 results) Book (1 results)

  • [Journal Article] Formation of ultrathin segregated-Ge crystal on Al/Ge(111) surface2020

    • Author(s)
      Kobayashi Masato、Ohta Akio、Kurosawa Masashi、Araidai Masaaki、Taoka Noriyuki、Simizu Tomohiro、Ikeda Mitsuhisa、Makihara Katsunori、Miyazaki Seiichi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 59 Issue: SG Pages: SGGK15-SGGK15

    • DOI

      10.35848/1347-4065/ab69de

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Al/Ge(111)の表面偏析制御による極薄Ge結晶形成2020

    • Author(s)
      小林 征登、大田 晃生、田岡 紀之、池田 弥央、牧原 克典、宮﨑 誠一
    • Organizer
      2020年 第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Growth of Hetero-epitaxial Al on Ge(111) and Segregation of Ge Crystal by Annealing2019

    • Author(s)
      M. Kobayashi, A. Ohta, M. Kurosawa, M. Araidai, M. Ikeda, N. Taoka, T. Shimizu, K. Makihara, and S. Miyazaki
    • Organizer
      32th International Microprocesses and Nanotechnology Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth of Ultrathin Segregated-Ge Crystal on Al/Ge(111) Surface2019

    • Author(s)
      M. Kobayashi, A. Ohta, M. Kurosawa, M. Araidai, M. Ikeda, N. Taoka, T. Shimizu, K. Makihara, and S. Miyazaki
    • Organizer
      2019 International Conference of Solid State of Device and Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] First-Principles Study on Formation of Freestanding Silicene and Germanene2019

    • Author(s)
      M. Araidai, M. Kurosawa, A. Ohta, and K. Shiraishi
    • Organizer
      2019 International Conference of Solid State of Device and Materials
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Al/Ge(111)構造で生じる表面偏析を利用した極薄Ge結晶形成2019

    • Author(s)
      小林 征登、大田 晃生、田岡 紀之、池田 弥央、牧原 克典、宮﨑 誠一
    • Organizer
      第19回 日本表面科学会中部支部・学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 熱処理によるAl/Ge(111)上の極薄Ge層形成2019

    • Author(s)
      小林 征登、大田 晃生、黒澤 昌志、洗平 昌晃、田岡 紀之、池田 弥央、牧原 克典、宮﨑 誠一
    • Organizer
      電気通信情報学会(SDM) [シリコン材料・デバイス] シリコンテクノロジー分科会 6月度合同研究会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ヘテロエピタキシャルAl/Ge(111)上に偏析した極薄Geの化学分析2019

    • Author(s)
      小林 征登、大田 晃生、黒澤 昌志、洗平 昌晃、田岡 紀之、池田 弥央、牧原 克典、宮﨑 誠一
    • Organizer
      2019年 第66回応用物理学会春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] Ge 2D Crystal Growth on Hetero-epitaxial Ag/Ge(111) by N2 Annealing2018

    • Author(s)
      A. Ohta K. Ito, M. Kurosawa, M. Araidai, M. Ikeda, K. Makihara, and S. Miyazaki
    • Organizer
      49th IEEE Semiconductor Interface Specialists Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] First-Principles Study on Hydrogen Adsorption and Desorption of Silicene and Germanene2018

    • Author(s)
      M. Araidai, M. Kurosawa, A. Ohta, and K. Shiraishi
    • Organizer
      14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-14) in conjunction with 26th International Colloquium on Scanning Probe Microscopy (ICSPM26)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] エピタキシャルAl/Ge(111)の形成と真空中熱処理による表面平坦化およびGe析出2018

    • Author(s)
      小林 征登、大田 晃生、黒澤 昌志、洗平 昌晃、田岡 紀之、池田 弥央、牧原 克典、宮崎 誠一
    • Organizer
      応用物理学会SC東海地区学術講演会2018
    • Related Report
      2018 Research-status Report
  • [Presentation] Two Dimensional Ge Crystal Growth by Annealing of Metal/Ge Stack2018

    • Author(s)
      大田 晃生
    • Organizer
      第2回「ポストグラフェン材料のデバイス開発研究会」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Why chose a diffusion method towards creation of silicene & germanene2018

    • Author(s)
      黒澤 昌志
    • Organizer
      第2回「ポストグラフェン材料のデバイス開発研究会」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] First-principles study on hydrogen adsorption-desorption property and simulated STM Images of germanene2018

    • Author(s)
      洗平 昌晃
    • Organizer
      第2回「ポストグラフェン材料のデバイス開発研究会」
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] 真空蒸着によるGe(111)上のAlヘテロエピタキシャル成長2018

    • Author(s)
      小林 征登、大田 晃生、黒澤 昌志、洗平 昌晃、池田 弥央、牧原 克典、宮﨑 誠一
    • Organizer
      2018年 第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] IV族二次元結晶の電子状態・水素吸脱着に関する第一原理計算2018

    • Author(s)
      洗平 昌晃
    • Organizer
      第1回 日本表面真空学会若手研究会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Book] 「共晶系で生じる析出現象を応用したIV族系ナノシート形成技術」、 ポストグラフェン材料の創製と用途開発最前線 -二次元ナノシートの物性評価、構造解析、合成、成膜プロセス技術-2020

    • Author(s)
      黒澤昌志, 大田晃生
    • Total Pages
      10
    • Publisher
      (株)エヌ・ティー・エス
    • Related Report
      2019 Annual Research Report

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Published: 2018-07-25   Modified: 2021-02-19  

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