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Operation mechanism of VO2-channel Mott transistors and their low-voltage operation

Research Project

Project/Area Number 15K17466
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionThe University of Tokyo

Principal Investigator

Yajima Takeaki  東京大学, 大学院工学系研究科(工学部), 助教 (10644346)

Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords酸化バナジウム / モット転移 / 金属絶縁体転移 / 相転移 / 電界効果トランジスタ / ショットキー接合 / 酸化物ヘテロ構造 / エピタキシャル界面 / 固体ゲート / 集団性 / モットトランジスタ
Outline of Final Research Achievements

Today's electronics strongly desires the low-voltage transistors for decreasing the power consumption of the next-generation integrated circuits. This research focused on the novel field-effect transistor which incorporates the metal-insulator transitions of VO2 in the transistor channel, and is expected to sharpen the switching slope and achieve the low-voltage operation. The transistor incorporating VO2 was successfully demonstrated, and its operation mechanism was elucidated through the evaluation of the local electronic states at the interface as well as the interaction between the interface and the rest of the VO2 channel.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (12 results)

All 2017 2016 2015

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results,  Open Access: 1 results) Presentation (9 results) (of which Int'l Joint Research: 8 results,  Invited: 3 results)

  • [Journal Article] Identifying the Collective Length in VO2 Metal/Insulator Transistions2017

    • Author(s)
      T. Yajima, T. Nishimura, A. Toriumi
    • Journal Title

      Small

      Volume: 13 Issue: 12

    • DOI

      10.1002/smll.201603113

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Drastic change in electronic domain structures via strong elastic coupling in VO2 films.2015

    • Author(s)
      T. Yajima, Y. Ninomiya, T. Nishimura, A. Toriumi
    • Journal Title

      Phys. Rev. B

      Volume: 91 Issue: 20 Pages: 205102-205102

    • DOI

      10.1103/physrevb.91.205102

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Positive-bias gate-controlled metal-insulator transition in ultrathin VO2 channels with TiO2 gate dielectrics.2015

    • Author(s)
      T. Yajima, T. Nishimura, A. Toriumi
    • Journal Title

      Nature Commun.

      Volume: 6 Issue: 1 Pages: 10104-10104

    • DOI

      10.1038/ncomms10104

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Time Response Characteristics of the VO2 Mott Transistor.2016

    • Author(s)
      T. Yajima
    • Organizer
      JSPS MEETING 2016 (C2C Program)
    • Place of Presentation
      ユーリッヒ研究センタ(Julich, Germany)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Collective gate modulation in Mott transistors with ultrathin VO2 channels.2016

    • Author(s)
      T. Yajima
    • Organizer
      2016 Asia-Pacific Workshop on Fundamentals and Applications of Advanced Semiconductor Devices
    • Place of Presentation
      函館国際ホテル(函館市・北海道)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Time Response to The Gate Voltagein Strongly Correlated TransistorsUsing Epitaxial VO2/TiO2 Stacks2016

    • Author(s)
      T. Yajima
    • Organizer
      Workshop on Oxide Electronics 23
    • Place of Presentation
      Nanjing International Conference Hotel(南京・中国)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Time Response of Gate-Controlled Metal-Insulator Transitions in Ultrathin VO2 Channels2016

    • Author(s)
      T. Yajima
    • Organizer
      SSDM2016
    • Place of Presentation
      つくば国際会議場(つくば・茨城県)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] VO2薄膜への局所的な不純物ドープによる独立フォノンの形成2016

    • Author(s)
      T. Yajima
    • Organizer
      応用物理学会2016 秋季講演会
    • Place of Presentation
      朱鷺メッセ(新潟・新潟県)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Interaction between 2D Electrons and 3D Metal-Insulator Transitions in VO2-Channel Transistors.2015

    • Author(s)
      Takeaki Yajima
    • Organizer
      CEMS Topical Meeting on Oxide Interfaces
    • Place of Presentation
      理化学研究所(埼玉県・和光市)
    • Year and Date
      2015-11-05
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Solid-State Operation of Mott Transistors with Ultra-Thin VO2 Channels2015

    • Author(s)
      T. Yajima, T. Nishimura, A, Toriumi
    • Organizer
      SSDM 2015
    • Place of Presentation
      札幌コンベンションセンター(北海道・札幌市)
    • Year and Date
      2015-09-29
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Interaction between 2D electrons and 3D metal-insulator transition in VO2-channel transistors2015

    • Author(s)
      T. Yajima, T. Nishimura, and A. Toriumi
    • Organizer
      ep2ds-21
    • Place of Presentation
      仙台国際センター(宮城県・仙台市)
    • Year and Date
      2015-07-28
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Critical Role of Domain Boundary Parallel to the Interface in the Operation of VO2 Mott Transistors2015

    • Author(s)
      Takeaki Yajima, Tomonori Nishimura, Akira Toriumi
    • Organizer
      2015 MRS Spring Meeting
    • Place of Presentation
      San Francisco(USA)
    • Year and Date
      2015-04-07
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2018-03-22  

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