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Development of spin-polarized scanning tunneling luminescence spectroscopy for elucidation of spin-photon conversion in two-dimensional semiconductors

Research Project

Project/Area Number 17K18766
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics and related fields
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Imada Hiroshi  国立研究開発法人理化学研究所, 開拓研究本部, 研究員 (80586917)

Project Period (FY) 2017-06-30 – 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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsスピントロニクス / 光物性 / 走査トンネル顕微鏡 / スピン-光変換 / 二次元半導体 / スピン流 / 偏光 / STM発光 / 走査プローブ顕微鏡 / スピン
Outline of Final Research Achievements

The purpose of this research is to develop a unique technique, spin-polarized scanning tunneling luminescence spectroscopy (SP-STL), giving spin resolution to our STL system. In the 1st and 2nd years, we have established the SP-STL system, as well as spin-polarized STM technique. It allows us to observe spin-photon conversion dynamics at the atomic scale in a semiconductor GaAs. In the 3rd year, further experiments and detailed analysis of the SP-STL measurements revealed that SP-STL captured the relaxation dynamics of spin current. In addition to the angular momentum conversion between individual electrons and photons, we also found that there is an angular momentum correlation between collective electrons (plasmon) and photons.

Academic Significance and Societal Importance of the Research Achievements

本研究の最も大きな意義は、スピントロニクスの基礎研究において、原子スケールでスピン-光変換ダイナミクスを議論できる、唯一無二の強力な手段が確立された事である。スピン-光変換も含めた、様々な機能性で注目される二次元物質は、その二次元性から欠陥や不純物に大きく影響される特徴を持つ。そのため、Photoluminescence(PL)法などでは解明できなかった欠陥や不純物によるスピン散乱を直接測定できるようになった点は、測定手法としての明らかな優位性となる。また、スピン流のダイナミクスを原子スケールで可視化できる点は、他に類を見ない測定手段が実現されたという意味で、本研究の独創的な価値である。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (28 results)

All 2020 2019 2018 2017

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (25 results) (of which Int'l Joint Research: 10 results,  Invited: 7 results)

  • [Journal Article] Single-molecule resonance Raman effect in a plasmonic nanocavity2020

    • Author(s)
      Jaculbia Rafael B.、Imada Hiroshi、Miwa Kuniyuki、Iwasa Takeshi、Takenaka Masato、Yang Bo、Kazuma Emiko、Hayazawa Norihiko、Taketsugu Tetsuya、Kim Yousoo
    • Journal Title

      Nature Nanotechnology

      Volume: 15 Issue: 2 Pages: 105-110

    • DOI

      10.1038/s41565-019-0614-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Selective triplet exciton formation in a single molecule2019

    • Author(s)
      Kimura Kensuke、Miwa Kuniyuki、Imada Hiroshi、Imai-Imada Miyabi、Kawahara Shota、Takeya Jun、Kawai Maki、Galperin Michael、Kim Yousoo
    • Journal Title

      Nature

      Volume: 570 Issue: 7760 Pages: 210-213

    • DOI

      10.1038/s41586-019-1284-2

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Single-Molecule Investigation of Energy Dynamics in a Coupled Plasmon-Exciton System2017

    • Author(s)
      Imada Hiroshi、Miwa Kuniyuki、Imai-Imada Miyabi、Kawahara Shota、Kimura Kensuke、Kim Yousoo
    • Journal Title

      Physical Review Letters

      Volume: 119 Issue: 1 Pages: 013901-013901

    • DOI

      10.1103/physrevlett.119.013901

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 光STMを用いた単一分子分光2019

    • Author(s)
      今田裕, 三輪邦之, 今井みやび, 河原祥太, 木村謙介, 金有洙
    • Organizer
      2019年日本表面真空学会学術講演会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 走査トンネル顕微鏡を用いた単一分子の蛍光分光2019

    • Author(s)
      今田裕, 今井みやび, 木村謙介, 三輪邦之, 金有洙
    • Organizer
      第31回分子科学討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] STM発光分光法を用いた選択的な三重項励起子形成の単一分子計測2019

    • Author(s)
      木村謙介, 三輪邦之, 今田裕, 今井みやび, 河原祥太, 竹谷純一, 川合眞紀, マイケル ガルペリン, 金有洙
    • Organizer
      2019年第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スピン偏極STM発光分光法を用いた原子精度でのスピン注入と磁気二色性の観測2019

    • Author(s)
      山本駿玄, 今田裕, 金有洙
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Plasmon-exciton coupling at an STM junction: fundamental and applications for spatially-resolved single-molecule spectroscopy2019

    • Author(s)
      H. Imada
    • Organizer
      27th International Colloquium on Scanning Probe Microscopy (ICSPM27)
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] STM study of exciton creation and annihilation in a single molecule2019

    • Author(s)
      H. Imada
    • Organizer
      The 81st Okazaki Conference "Forefront of Measurement Technologies for Surface Chemistry and Physics in Real-Space, k-Space, and Real-Time"
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Creation of spin singlet and triplet excitons in a single moleculen2019

    • Author(s)
      K. Kimura, K. Miwa, H. Imada, M. Imai-Imada, Y. Kim
    • Organizer
      International School and Symposium on Nanoscale Transport and phoTonics (ISNTT2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Atomic-scale study of exciton creation and annihilation in a molecular system2019

    • Author(s)
      H. Imada
    • Organizer
      IBS-RIKEN Joint Conference
    • Related Report
      2019 Annual Research Report
  • [Presentation] Investigation of selective triplet exciton formation in a molecule with an STM2019

    • Author(s)
      K. Kimura, K. Miwa, H. Imada, M. Imai-Imada, S. Kawahara, J. Takeya, M. Kawai, M. Galperin, Y. Kim
    • Organizer
      704.WE-Heraeus-Seminar "Exploring the Limits of Nanoscience with Scanning Probe Methods"
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] スピン偏極STM発光分光法を用いた原子精度でのスピン注入と磁気二色性の観測2018

    • Author(s)
      山本駿玄, 今田裕, 金有洙
    • Organizer
      表面・界面スペクトロスコピー2018
    • Related Report
      2018 Research-status Report
  • [Presentation] スピン偏極STM発光分光法を用いた原子精度でのスピン注入と磁気二色性の観測2018

    • Author(s)
      山本駿玄, 今田裕, 金有洙
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Investigation of the Exciton Formation in a Single Molecule with a Scanning Tunneling Microscope2018

    • Author(s)
      K. Kimura, H. Imada, K. Miwa, M. Imai-Imada, S. Kawahara, J. Takeya, M. Kawai, Y. Kim
    • Organizer
      American Physical Society March Meetings
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theory of current fluctuation for single molecule junction with intra-molecule Coulomb interaction and multimode vibronic interactions2018

    • Author(s)
      K. Miwa, H. Imada, F. Chen, K. Kimura, M. Imai-Imada, Y. Kim, M. Galperin
    • Organizer
      American Physical Society March Meetings
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 分子内電子間相互作用および振電相互作用を考慮した単一分子の電界誘起発光の量子多体理論,2018

    • Author(s)
      三輪邦之, 今田裕, 木村謙介, 今井みやび, M. Galperin, 金有洙
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 走査トンネル顕微鏡を用いた電荷注入による三重項励起子の選択的形成2018

    • Author(s)
      木村謙介, 今田裕, 三輪邦之, 今井みやび, 河原祥太, 竹谷純一, 川合眞紀, 金有洙
    • Organizer
      日本物理学会第73回年次大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Single-molecule investigation of plasmon-exciton coupling2017

    • Author(s)
      H. Imada, K. Miwa, M. Imai-Imada, K. Kimura, S. Kawahara, Y. Kim
    • Organizer
      5th Ito International Research Conference (IIRC5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Interference effects on scanning tunneling microscope-induced light emission from coupled system of molecular exciton and interface plasmons2017

    • Author(s)
      K. Miwa, H. Imada, M. Imai-Imada, K. Kimura, Y. Kim
    • Organizer
      5th Ito International Research Conference (IIRC5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Direct visualization of Surface Phase of Oxygen Molecules Physisorbed on the Ag(111) Surface: A Two-dimensional Quantum Spin System2017

    • Author(s)
      S. Yamamoto, Y. Yoshida, H. Imada, Y. Kim, Y. Hasegawa
    • Organizer
      5th Ito International Research Conference (IIRC5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Phosphorescence detection from a single molecule with an STM2017

    • Author(s)
      K. Kimura, H. Imada, K. Miwa, M. Imai-Imada, S. Kawahara, J. Takaya, M. Kawai, Y. Kim
    • Organizer
      5th Ito International Research Conference (IIRC5)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spectroscopic investigation of single molecule energy dynamics with a scanning tunneling microscope2017

    • Author(s)
      H. Imada
    • Organizer
      The 4th International Conference & Exhibition for Nanotechnology(NANOPIA 2017)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Single molecule investigation of energy absorption, emission, and transfer dynamics with a scanning tunneling microscope2017

    • Author(s)
      H. Imada
    • Organizer
      Nano Korea 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 光と走査トンネル顕微鏡を組み合わせて見る単一分子エネルギー変換/移動ダイナミクス2017

    • Author(s)
      今田裕
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 単一分子の電界誘起発光における電子相関効果2017

    • Author(s)
      三輪邦之, 今田裕, 木村謙介, Michael Galperin, 金有洙
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 絶縁体超薄膜上に吸着したPTCDA単一分子からの選択的な燐光発生2017

    • Author(s)
      木村謙介, 今田裕, 三輪邦之, 今井みやび, 河原祥太, 竹谷純一, 川合眞紀, 金有洙
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 光STMを用いた単一分子エネルギーダイナミクスの分光解析2017

    • Author(s)
      今田裕
    • Organizer
      第37回表面科学学術講演会
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-07-21   Modified: 2021-02-19  

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