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Developments of single-electron spin transistors with molecular quantum dots

Research Project

Project/Area Number 18H01481
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionNational Institute for Materials Science

Principal Investigator

HAYAKAWA Ryoma  国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主幹研究員 (90469768)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2020: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2019: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Keywords分子スピントランジスタ / 量子ドット / 磁性分子 / 2重トンネル接合 / 縦型トランジスタ / 縦型単電子スピントランジスタ / 分子スピン / 磁気トンネル接合 / 磁気抵抗効果 / トンネル電流 / トンネル2重接合 / 単電子トンネリング / 高集積化 / 分子 / 単電子スピン操作 / 縦型スピントランジスタ / 強磁性電極 / スピントランジスタ
Outline of Final Research Achievements

We have proposed a new vertical spin transistor, where magnetic molecules are embedded as spin quantum dots in a double tunnel junction. First, a double tunnel junction with organic molecules was formed and the junction was employed as the channel layer in the vertical transistor. Single carrier tunneling reflecting molecular orbitals was found to be induced in the transistor. The drain current was effectively controlled by the gate voltage. Second, we have established the formation process of double tunnel junctions based on ferromagnetic electrodes. The induced tunneling current was modulated by the spin inversion in the ferromagnetic electrodes. Finally, we adopted organic radicals as spin quantum dots in the double tunnel junction. We observed the tunneling currents via the organic molecules and consequently achieved the observation of negative magnetoresistance.

Academic Significance and Societal Importance of the Research Achievements

本申請課題では、分子の持つ量子ドットとしての優れた特徴と分子スピン機能を融合した新しいスピントランジスタを創成することを目的とした。分子を電子デバイスに用いる提案は古くからあるが、ナノプローブやナノギャップ電極を用いた基礎物性評価に留まってきた。それに対し、本提案素子は、分子が絶縁膜に内包されているため、これまで分子デバイスが苦手としてきたリソグラフィー技術を活用した微細化が可能となる。高集積可能な分子スピントロニクス素子の開発に繋がる成果である。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (18 results)

All 2022 2021 2020 2019 2018 Other

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (15 results) (of which Int'l Joint Research: 11 results,  Invited: 6 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Theoretical Insight into Quantum Transport Via Molecular Dots in a Vertical Tunnel Transistor2021

    • Author(s)
      Basu Tuhin Shuvra、Wakayama Yutaka、Hayakawa Ryoma
    • Journal Title

      ACS Applied Electronic Materials

      Volume: 3 Issue: 2 Pages: 973-978

    • DOI

      10.1021/acsaelm.0c01056

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Vertically-Aligned Single Carrier Devices with Molecular Quantum dots for Large-Scale Integration2021

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      WPI-MANA Virtual City of Workshops
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Vertically-Aligned Molecular Transistors for Large-Scale Integration2021

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      Materials Research Meeting 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Single Carrier Transistors with Molecular Quantum Dots2021

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      2021 KJF International Conference on Organic Materials for Electronics and Photonics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CMOSプロセスに適合した縦型分子トランジスタの開発2021

    • Author(s)
      早川 竜馬
    • Organizer
      第82回応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Integration of attractive molecular functions into a single-carrier transistor2021

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      Clustering and Global Challenges
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] アンチ・アンバイポーラトランジスタの開発 I ‐動作原理と多値論理回路への応用‐2020

    • Author(s)
      早川竜馬、小橋和義、若山裕
    • Organizer
      第67回 応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Vertical Resonant Tunneling Devices Brought about by Integration of Attractive Molecules into Current Si devices2019

    • Author(s)
      Ryoma Hayakawa, Yutaka Wakayama
    • Organizer
      2019 Collaborative Conference on Materials Research (CCMR)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Vertically-aligned molecular transistors for large-scale integration2019

    • Author(s)
      Ryoma Hayakawa, Toyohiro Chikyow, Yutaka Wakayama
    • Organizer
      10th international conference on molecular electronics & bioelectronics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vertically-aligned resonant tunneling devices with organic molecules as quantum dots2019

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      International Conference on Materials Science and Engineering
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Quantum molecular devices for large-scale integration2019

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      2019 International Symposium on Future Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Vertical resonant tunneling devices with attractive molecular quantum dots2019

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      MANA international symposium 2019
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vertical resonant tunneling transistors with molecular quantum dots2018

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      International conference on nanoelectronics strategy
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 機能性分子を用いた共鳴トンネルデバイス2018

    • Author(s)
      早川竜馬
    • Organizer
      FT-IR・ラマンユーザーズフォーラム
    • Related Report
      2018 Annual Research Report
  • [Presentation] 機能性分子を量子ドットに用いた共鳴トンネルデバイス2018

    • Author(s)
      早川竜馬
    • Organizer
      応用物理学会 有機分子・バイオエレクトロニクス分科会研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Vertical resonant tunneling transistors with molecular quantum dots2018

    • Author(s)
      Ryoma Hayakawa
    • Organizer
      International Conference on Emerging Advanced Nanomaterials (ICEAN) 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] System-Materials Nanoarchitectonics2022

    • Author(s)
      Ryoma Hayakawa, Toyohiro Chikyow, Yutaka Wakayama (Yutaka Wakayama, Katsuhiko Ariga, Editors))
    • Total Pages
      338
    • Publisher
      Springer
    • ISBN
      9784431569114
    • Related Report
      2021 Annual Research Report
  • [Remarks] SAMURAI

    • URL

      https://samurai.nims.go.jp/profiles/hayakawa_ryoma?locale=ja

    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2023-01-30  

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