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Challenge for implementing a Mott FET on thin films of Mott insulators

Research Project

Project/Area Number 15F15315
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Thin film/Surface and interfacial physical properties
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

井上 公  国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 主任研究員 (00356502)

Co-Investigator(Kenkyū-buntansha) SCHULMAN ALEJANDRO  国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 外国人特別研究員
SHULMAN ALEJANDRO  国立研究開発法人産業技術総合研究所, 電子光技術研究部門強相関エレクトロニクスグループ, 外国人特別研究員
Project Period (FY) 2015-11-09 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2017: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2016: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2015: ¥600,000 (Direct Cost: ¥600,000)
Keywordsチタン酸ストロンチウム / 金属絶縁体転移 / 2次元金属 / 人工ニューロン / 人工シナプス / 機械学習 / 近藤効果 / 非線形ホール効果 / 強相関エレクトロニクス / モットFET / ニューロモルフィック / 酸素欠損 / 負の静電容量 / 電界効果トランジスタ / パリレン / サブスレショルドスイング / 易動度 / 負性抵抗
Outline of Annual Research Achievements

本年度はSrTiO3 FETの金属絶縁体転移のメカニズムを探るため、これまでよりも詳細な実験とシミュレーションによる研究を行いました。これによって、FET特性の閾値が、ゲート電圧印加の履歴の関数になることが判明しました。酸素欠損がバルクに追いやられバックゲートのように働くという仮定から導かれる特性とよく一致しています。このSrTiO3の金属非金属転移の履歴現象を用いて、スパイク時刻依存可塑性(STDP)という脳の中にあるシナプスの特性を真似することに成功し、SrTiO3 FETを用いた人工シナプスを開発することに成功しました。このデバイスの特性パラメータを抽出し、それを使って、機械学習のシミュレーションも行いました。60000の手書き数字で学習を行い、10000の手書き数字で認識のテストを行ったところ、70%を超える良い精度で認識に成功しました。さらに同じデバイスが人工ニューロンとしても動作することを確認しました。従来の人工ニューロンは大きなコンデンサを搭載して積分動作を行なっていましたが、我々のニューロンはSrTiO3 FETの閾値がゲート電圧の履歴で変化することを利用した人工ニューロンであり、集積化を阻む「コンデンサ」を必要としない画期的デバイスです。デバイス開発の分野で世界最大の国際会議IEDMに採択され、研究発表を行いました。現在論文を投稿中です。さらにSrTiO3-FETの低温から極低温までの物性探索を行い、低温で出現する近藤効果と非線形ホール効果を2キャリアモデルで説明することに成功しました。こちらも重要な成果であり、論文投稿準備中です。

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (28 results)

All 2018 2017 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results,  Open Access: 1 results) Presentation (18 results) (of which Int'l Joint Research: 13 results,  Invited: 10 results) Remarks (2 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 2 results) Funded Workshop (1 results)

  • [Int'l Joint Research] CNRS(フランス)

    • Related Report
      2016 Annual Research Report
  • [Int'l Joint Research] CIC nanoGUNE(スペイン)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Sign-changing non-monotonic voltage gain of HfO2/Parylene-C/SrTiO3 field-effect transistor due to percolative insulator to two-dimensional metal transition.2017

    • Author(s)
      Alejandro Schulman, Ai Kitoh, Pablo Stoliar, Isao H. Inoue
    • Journal Title

      Applied Physics Letters

      Volume: 110 Issue: 1 Pages: 013502-013502

    • DOI

      10.1063/1.4973739

    • Related Report
      2017 Annual Research Report 2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Anomalous enhancement of the sheet carrier density beyond the classic limit on a SrTiO3 surface.2016

    • Author(s)
      Neeraj Kumar, Ai Kitoh, Isao H. Inoue
    • Journal Title

      Scientific Reports

      Volume: 6 Issue: 1

    • DOI

      10.1038/srep25789

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Artificial synapses and neurons based on an insulator-to-2D metal transition of a SrTiO3 surface.2018

    • Author(s)
      Pablo Stoliar, Alejandro Schulman, Ai Kitoh, Isao H. Inoue
    • Organizer
      ICCMSE2018
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Implementation of both synapse and neuron on a field-induced insulator-to-2d metal transition device with SrTiO3 channel.2017

    • Author(s)
      Pablo Stoliar, Alejandro Schulman, Ai Kitoh, Isao H. Inoue
    • Organizer
      NOLTA 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] STDP synapse with outstanding stability based on a novel insulator-to-metal transition FET2017

    • Author(s)
      Pablo Stoliar, Alejandro Schulman, Ai Kitoh, Akihito Sawa, Isao H. Inoue
    • Organizer
      IEDM 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Insulator to 2D metal transition, negative capacitance, and Kondo effect, revealed by electrostatic sweep of oxygen vacancies out of a SrTiO3 surface.2017

    • Author(s)
      Alejandro Schulman, Pablo Stoliar, Ai Kitoh, Isao H. Inoue
    • Organizer
      International Conference "ELECTRON CORRELATION IN SUPERCONDUCTORS AND NANOSTRUCTURES"
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Multichannel Conduction and Kondo Effect in Solid-Gated SrTiO32017

    • Author(s)
      Alejandro Schulman, Pablo Stoliar, Ai Kitoh, Marcelo Rozenberg, Isao H. Inoue
    • Organizer
      IUMRS ICAM 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Shall we resort to an insulator-2D metal transition to implement bio-inspired electronics?2017

    • Author(s)
      Alejandro Schulman, Pablo Stoliar, Ai Kitoh, Isao H. Inoue
    • Organizer
      EMN Summer Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 絶縁体/2次元金属相転移を用いてニューロモルフィック素子を作ろう2017

    • Author(s)
      Schulman Alejandro, Ai Kitoh, Pablo Stoliar, Marcelo Rozenberg, Isao H. Inoue
    • Organizer
      日本物理学会 第72回年次大会(2017年)
    • Place of Presentation
      大阪大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] Solid-gate control of the two-dimensional electron gas at the SrTiO3 surface for neuromorphic applications.2017

    • Author(s)
      Schulman Alejandro, Ai Kitoh, Pablo Stoliar, Marcelo Rozenberg, Isao H. Inoue
    • Organizer
      APS March Meeting 2017
    • Place of Presentation
      New Orleans, USA
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Is my device neuromorphic?2017

    • Author(s)
      Pablo Stoliar, Schulman Alejandro, Isao H. Inoue
    • Organizer
      第64回応用物理学会春季学術講演会
    • Place of Presentation
      横浜
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] SrTiO3単結晶(100)面の金属化に伴う負の静電容量の出現2016

    • Author(s)
      Neeraj Kumar, Schulman Alejandro, Ai Kitoh, Pablo Stoliar, Isao H. Inoue
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] Anomalous channel formation in solid-gated SrTiO3.2016

    • Author(s)
      Pablo Stoliar, Schulman Alejandro, Isao H. Inoue
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] Multiband conduction on solid gate-controlled carrier density in SrTiO3 surface.2016

    • Author(s)
      Schulman Alejandro, Pablo Stoliar, Isao H. Inoue
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学
    • Related Report
      2016 Annual Research Report
  • [Presentation] Negative charge-compressibility at the channel of SrTiO3 field-effect transistor.2016

    • Author(s)
      Schulman Alejandro, Neeraj Kumar, Ai Kitoh, Pablo Stoliar, Isao H. Inoue
    • Organizer
      SUPERSTRIPES 2016
    • Place of Presentation
      Ischia, Italy
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] NEGATIVE CHARGE-COMPRESSIBILITY OF SrTiO3 FET.2016

    • Author(s)
      Schulman Alejandro, Neeraj Kumar, Ai Kitoh, Pablo Stoliar, Isao H. Inoue
    • Organizer
      IMPACT 2016
    • Place of Presentation
      Cargese, France
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Active artificial synapse based on 2DEG2016

    • Author(s)
      Pablo Stoliar, Schulman Alejandro, Ai Kitoh, Isao H. Inoue
    • Organizer
      SSDM2016
    • Place of Presentation
      つくば
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Insulator to 2D metal transition at the surface of SrTiO3 with negative charge compressibility and Kondo effect2016

    • Author(s)
      Schulman Alejandro, Neeraj Kumar, Ai Kitoh, Pablo Stoliar, Marcelo Rozenberg, Isao H. Inoue
    • Organizer
      EMN Meeting on Quantum Matter 2016
    • Place of Presentation
      Port Louis, Mauritius
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Enormous electrostatic carrier doping of SrTiO3: negative capacitance?2015

    • Author(s)
      I. H. Inoue
    • Organizer
      International Workshop of Bad Metal in Mott Systems
    • Place of Presentation
      Mainz, Germany
    • Year and Date
      2015-07-02
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Negative capacitance? 1000% enhancement of the carrier density at the surface of non-doped SrTiO3.2015

    • Author(s)
      I. H. Inoue
    • Organizer
      International Conference SUPERSTRIPES 2015
    • Place of Presentation
      Ischia, Italy
    • Year and Date
      2015-06-15
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] Isao H. Inoue's homepage

    • URL

      https://staff.aist.go.jp/i.inoue/

    • Related Report
      2016 Annual Research Report
  • [Remarks] Dr. Isao H. Inoue

    • URL

      https://staff.aist.go.jp/i.inoue/

    • Related Report
      2015 Annual Research Report
  • [Patent(Industrial Property Rights)] 電界効果トランジスタ及びその製造方法2017

    • Inventor(s)
      井上 公
    • Industrial Property Rights Holder
      井上 公
    • Industrial Property Rights Type
      特許
    • Filing Date
      2017-01-18
    • Related Report
      2016 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] VARIABLE GAIN AMPLIFIER2016

    • Inventor(s)
      P. Stoliar, I. Inoue 他
    • Industrial Property Rights Holder
      P. Stoliar, I. Inoue 他
    • Industrial Property Rights Type
      特許
    • Filing Date
      2016-09-09
    • Related Report
      2016 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 電界効果トランジスタ及びその製造方法2016

    • Inventor(s)
      井上 公
    • Industrial Property Rights Holder
      井上 公
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2016-013743
    • Filing Date
      2016-01-27
    • Related Report
      2015 Annual Research Report
  • [Funded Workshop] AIST mini-Workshop “Neuromorpic: from out-of-equilibrium physics to deep learning.”2016

    • Place of Presentation
      産業技術総合研究所(つくば市)
    • Related Report
      2016 Annual Research Report

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Published: 2015-11-26   Modified: 2024-03-26  

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