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Realization of high-performance monolithic phase transistors and their logic applications

Research Project

Project/Area Number 19K15026
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionKansai University (2020)
Osaka University (2019)

Principal Investigator

YAMAMOTO Mahito  関西大学, システム理工学部, 助教 (00748717)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Keywords二次元材料 / 相転移材料 / 急峻スロープFET / 遷移金属ダイカルコゲナイド / 二酸化バナジウム / 六方晶窒化ホウ素 / トランジスタ
Outline of Research at the Start

トランジスタにおける消費電力の低減は、テクノロジーが今後も持続的に発展する上で重要な要請の一つである。近年、超低消費電力トランジスタとして、絶縁体から金属へと熱的相転移を示す材料を電極に用いた、相転移トランジスタが注目されている。本研究では、モノリシック型相転移トランジスタにおいて相転移材料電極をナノスケール化することでその相転移特性を増強し、実用化に資する超低消費電力性・高速性の実現を目指す。さらには、高性能相転移トランジスタを基盤とした相補型論理回路を作製・評価することで、将来の集積回路への実装可能性を明らかにする。

Outline of Final Research Achievements

Phase transition transistors have been of great interest for electronic applications because of the possible low-power consumption operations. Here we fabricated phased transition transistors using a phase change material VO2 and two-dimensional MoS2 and constructed deep insights into the device performance. We found that a high contact resistance exists between VO2 and MoS2. In order to overcome the drawback in the device, we grew VO2 thin films on a two-dimensional insulator, which could be used a buffer layer between VO2 and MoS2 for the reduction of the contact resistance. Our findings would be a significant step toward practical applications of phase transition transistors in logic circuits.

Academic Significance and Societal Importance of the Research Achievements

コンピューターは、その基盤デバイスであるシリコンFETを微細化・集積化することで発展を遂げてきた。しかし、近年、微細化・集積化によるコンピューターの高速化は限界に近づいている一方、その消費電力は増加を続けている。したがって、現在のFETに代わる新原理・新構造FETの開発が必要不可欠とされている。本研究では、わずかなエネルギーで抵抗値が急激に変化する相転移材料と電界制御性の優れた二次元半導体を応用することで、低消費電力相転移FETの構築を目指したものである。本研究で得られた知見を元に高性能な相転移FETが実現できれば、将来的に相転移FETを基盤とする低消費電力コンピューターの実現も期待される。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (17 results)

All 2020 2019

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (16 results) (of which Int'l Joint Research: 7 results,  Invited: 2 results)

  • [Journal Article] Barrier Formation at the Contacts of Vanadium Dioxide and Transition-Metal Dichalcogenides2019

    • Author(s)
      Yamamoto Mahito、Nouchi Ryo、Kanki Teruo、Nakaharai Shu、Hattori Azusa N.、Watanabe Kenji、Taniguchi Takashi、Wakayama Yutaka、Ueno Keiji、Tanaka Hidekazu
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 11 Issue: 40 Pages: 36871-36879

    • DOI

      10.1021/acsami.9b13763

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 六方晶窒化ホウ素を基板としたVO2薄膜の成長とデバイス応用2020

    • Author(s)
      山本 真人、玄地 真悟、神吉 輝夫、野内 亮、谷口 尚、渡邊 賢司、田中 秀和
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 多段階化学気相成長法を用いたバナジウム硫化物薄膜の作成2020

    • Author(s)
      平尾 成、田中 秀和、若山 裕、山本 真人
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 六方晶窒化ホウ素挿入層によるイオン液体ゲーティング時における化学反応の抑制効果2020

    • Author(s)
      滝川 潤、山本 真人、谷口 尚、渡邊 賢司、神吉 輝夫、田中 秀和
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Characterization of the phase transition property of VO2 grown on hBN2020

    • Author(s)
      Shingo Genchi, Mahito Yamamoto, Kenji Watanabe, Takashi Taniguchi, Hidekazu Tanaka
    • Organizer
      PCOS2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Observation of Metal Insulator transition in VO2 ultrathin films2020

    • Author(s)
      Boyuan Yu, Shingo Genchi , Mahito Yamamoto, Kenji Watanabe, Takashi Taniguchi, Yasukazu Murakami, Takehiro Tamaoka , Hidekazu Tanaka
    • Organizer
      PCOS2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] Raman study of the phase transition in VO2 ultrathin films on hexagonal-boron nitride2020

    • Author(s)
      Boyuan Yu, Shingo Genchi, Mahito Yamamoto, Kenji Watanabe, Takashi Taniguchi
    • Organizer
      第39回電子材料シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] The phase transition properties of various thick VO2 thin films grown on hexagonal boron nitride2020

    • Author(s)
      Boyuan Yu Mahito Yamamoto, Shingo Genchi, Kenji Watanabe, Takashi Taniguchi, Hidekazu Tanakaa
    • Organizer
      The 23rd SANKEN International Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Growth and characterization of VO2 thin films on hexagonal boron nitride2019

    • Author(s)
      Shingo Genchi, Koji Shigematsu, Shodai Aritomi, Mahito Yamamoto, Teruo Kanki, Kenji Watanabe, Takashi Taniguchi, Yasukazu Murakami, Hidekazu Tanaka
    • Organizer
      iWOE International Workshop on Oxide Electronics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Growth and characterization of VO2 thin films on hexagonal boron nitride2019

    • Author(s)
      Shingo Genchi, Koji Shigematsu, Shodai Aritomi, Mahito Yamamoto, Teruo Kanki, Kenji Watanabe, Takashi Taniguchi, Yasukazu Murakami, Hidekazu Tanaka
    • Organizer
      2nd Workshop on Microactuators
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Scaling effects in the resistance-temperature characteristics of VO2 on hBN2019

    • Author(s)
      Shingo Genchi, Mahito Yamamoto, Teruo Kanki, Kenji Watanabe, Takashi Taniguchi, Hidekazu Tanaka
    • Organizer
      The international symposium for nano science
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Scaling effects in the resistance-temperature characteristics of VO2 on hBN2019

    • Author(s)
      Shingo Genchi, Mahito Yamamoto, Teruo Kanki, Kenji Watanabe, Takashi Taniguchi, Hidekazu Tanaka
    • Organizer
      Materials Research Society
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 六方晶窒化ホウ素上VO2における抵抗跳躍の電極間距離依存性2019

    • Author(s)
      玄地真悟、山本真人、神吉輝夫、渡邊賢司、谷口尚、田中秀和
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Phase transition FETs based on two-dimensional WSe2 with VO2 contacts2019

    • Author(s)
      M. Yamamoto, R. Nouchi, T. Kanki, S. Nakaharai, A. N. Hattori, K. Watanabe, T. Taniguchi, Y. Wakayama, K. Ueno, H. Tanaka
    • Organizer
      iWOE International Workshop on Oxide Electronics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Transfer characteristics of transition metal dichalcogenide transistors with VO2 contacts2019

    • Author(s)
      M. Yamamoto, R. Nouchi, T. Kanki, S. Nakaharai, A. N. Hattori, K. Watanabe, T. Taniguchi, Y. Wakayama, K. Ueno, H. Tanaka
    • Organizer
      Recent Progress on Graphene and 2D Materials Research 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] VO2/遷移金属ダイカルコゲナイド界面におけるフェルミレベルピンニング2019

    • Author(s)
      山本真人、野内亮、神吉輝夫、中払周、服部梓、谷口尚、渡邊賢司、若山裕、上野啓司、田中秀和
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 原子層物質上へのVO2薄膜成長と新奇トランジスタ応用2019

    • Author(s)
      山本真人
    • Organizer
      スパッタリングおよびプラズマプロセス技術部会(SP部会) 第162回定例研究会
    • Related Report
      2019 Research-status Report
    • Invited

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Published: 2019-04-18   Modified: 2022-01-27  

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