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Elucidation of spin-optical-charge dynamics of defect spin in silicon carbide toward efficient electrical spin readout

Research Project

Project/Area Number 23K22796
Project/Area Number (Other) 22H01526 (2022-2023)
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund (2024)
Single-year Grants (2022-2023)
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionKyoto University

Principal Investigator

Morioka Naoya  京都大学, 化学研究所, 准教授 (90905952)

Project Period (FY) 2024-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2024: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2023: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2022: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Keywords炭化ケイ素 / 点欠陥 / シリコン空孔 / V2 / 単一スピン / PDMR / 電気的検出 / 光電流 / 磁気共鳴 / SiC / スピン / 電気的検出磁気共鳴 / 半導体
Outline of Research at the Start

炭化ケイ素(SiC)は高感度な量子センサや量子情報処理・通信において有用と目されている様々な点欠陥スピンをホストし、かつ電子デバイスとして良好な動作が可能な半導体材料である。これまでに光電流を用いてSiC中のスピン点欠陥のコヒーレントな量子情報が室温で電気的に検出できることが見出されてきたが、光電流がスピン依存性を獲得するメカニズムやスピン依存性の大きさの決定要因は未だ明らかではない。本研究では、光励起下におけるSiC中の点欠陥スピンと電荷のダイナミクスを詳細に研究し、室温量子エレクトロニクスの基盤となる高効率な電気的スピン情報読出技術の確立につなげる。

Outline of Final Research Achievements

This research focused on the spin of the V2 center, a defect associated with a missing silicon atom in silicon carbide (SiC), and clarified the mechanism of spin readout via electrical measurements of photocurrent generated under optical excitation toward achieiving high-sensitivity spin readout. First, the study elucidated the mechanism by which the photocurrent becomes spin-dependent. Then, a device structure and operating conditions for efficient collection of the extremely weak photocurrent were established. Building on these insights, the measurement protocol was optimized, enabling the successful electrical detection of a single V2 spin at room temperature with high sensitivity. These results represent significant progress in both the physical understanding of the readout mechanism and the development of spin detection techniques toward applications in quantum technology.

Academic Significance and Societal Importance of the Research Achievements

本研究は、半導体材料SiCにおいて従来困難であった単一スピンの光電流による電気的検出を高感度に実現した。スピンは量子センサや量子情報処理における情報の担い手として注目されており、その室温における電気的な読み出しの実現は、小型化・集積化に向けた重要な要素となる。SiCは大面積ウェハの量産性や優れた半導体デバイス技術を備え、量子デバイスの社会実装に適した材料である。本研究で解明したスピン依存光電流の生成機構と単一欠陥の高感度計測デバイスの設計指針は、SiCを用いた量子技術応用に向けて学術的基盤を提供するものであり、電気的スピン読み出し技術の他材料系への展開にも道を拓く成果である。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • Research Products

    (19 results)
  • Research Data

    (1 results)

All 2025 2024 2023 2022 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (16 results) (of which Int'l Joint Research: 9 results,  Invited: 8 results) Remarks (1 results)

  • [Journal Article] Coherent photoelectrical readout of single spins in silicon carbide at room temperature2025

    • Author(s)
      Tetsuri Nishikawa, Naoya Morioka, Hiroshi Abe, Koichi Murata, Kazuki Okajima, Takeshi Ohshima, Hidekazu Tsuchida, Norikazu Mizuochi
    • Journal Title

      Nature Communications

      Volume: 16 Issue: 1 Pages: 3405-3405

    • DOI

      10.1038/s41467-025-58629-1

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Electrical detection of nuclear spins via silicon vacancies in silicon carbide at room temperature2022

    • Author(s)
      Nishikawa Tetsuri、Morioka Naoya、Abe Hiroshi、Morishita Hiroki、Ohshima Takeshi、Mizuochi Norikazu
    • Journal Title

      Applied Physics Letters

      Volume: 121 Issue: 18 Pages: 184005-184005

    • DOI

      10.1063/5.0115928

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Efficient coherent photoelectrical readout of spin in silicon carbide at room temperature2024

    • Author(s)
      Naoya Morioka, Tetsuri Nishikawa, Hiroshi Abe, Koichi Murata, Kazuki Okajima, Takeshi Ohshima, Hidekazu Tsuchida, Norikazu Mizuochi
    • Organizer
      Japan-Korea Spintronics Workshop
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Photoelectrical readout of electron and nuclear spins in silicon carbide at ambient conditions2024

    • Author(s)
      Naoya Morioka
    • Organizer
      816. WE-Heraeus-Seminar "Silicon Carbide: Classical and Quantum Technologies"
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 炭化ケイ素中点欠陥の量子的な光スピン機能とデバイス2024

    • Author(s)
      森岡直也
    • Organizer
      第3回超高速光エレクトロニクス研究会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 室温における4H-SiC中V2中心蛍光の偏光特性2024

    • Author(s)
      西川 哲理、森岡 直也、阿部 浩之、大島 武、水落 憲和
    • Organizer
      第85回応用物理学会秋季学術講演会
    • Related Report
      2024 Annual Research Report
  • [Presentation] Room-temperature photoelectrical detection of spins in silicon carbide2024

    • Author(s)
      Naoya Morioka
    • Organizer
      Quantum Innovation 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Study on the photoionization path in PDMR of silicon vacancies in silicon carbide2024

    • Author(s)
      Kazuki Okajima, Naoya Morioka, Tetsuri Nishikawa, Hiroshi Abe, Takeshi Ohshima, and Norikazu Mizuochi
    • Organizer
      Quantum Innovation 2024
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Silicon Vacancy in Silicon Carbide for Quantum Technologies2024

    • Author(s)
      Naoya Morioka
    • Organizer
      Impurity Spins for Quantum Information Science and Technologies (iSQIT24)
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 半導体SiC中点欠陥スピンの高感度な電気的検出2024

    • Author(s)
      森岡直也,西川哲理,阿部浩之,村田晃一,岡島和希, 大島武,土田秀一,水落憲和
    • Organizer
      スピントロニクス学術研究基盤と連携ネットワーク(Spin-RNJ)シンポジウム 2023年度報告会
    • Related Report
      2023 Annual Research Report
  • [Presentation] SiC中Si空孔スピンの光電流検出におけるイオン化経路の研究2024

    • Author(s)
      岡島和希, 森岡直也, 西川哲理, 阿部浩之, 大島武, 水落憲和
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Electrical detection of nuclear spins in silicon carbide using silicon vacancy quantum spins in ambient conditions2023

    • Author(s)
      Naoya Morioka, Tetsuri Nishikawa, Hiroshi Abe, Hiroki Morishita, Takeshi Ohshima, and Norikazu Mizuochi
    • Organizer
      International Conference on Silicon Carbide and Related Materials 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Electrical Spin Detection in Diamond and Silicon Carbide for Quantum Technologies2023

    • Author(s)
      Naoya Morioka, Hiroki Morishita, Tetsuri Nishikawa, and Norikazu Mizuochi
    • Organizer
      Quantum Technology with Defects in Semiconductors (Satellite session of The 13th International Conference on Advanced Materials and Devices)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 炭化ケイ素中のシリコン空孔量子光源2023

    • Author(s)
      森岡直也
    • Organizer
      第70回応用物理学会春季学術講演会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 炭化ケイ素中の欠陥電子スピンおよび核スピンの室温での電気的検出2023

    • Author(s)
      森岡直也、西川哲理、阿部浩之、森下弘樹、大島武、水落憲和
    • Organizer
      スピントロニクス学術研究基盤と連携ネットワーク(Spin-RNJ)シンポジウム 2022年度報告会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Spin-optical dynamics study and approach to quantum electronics for quantum applications of silicon vacancy in SiC2022

    • Author(s)
      Naoya Morioka, Di Liu, Tetsuri Nishikawa, Oney O. Soykal, Hiroki Morishita, Izel Gediz, Charles Babin, Rainer Stoehr, Hiroshi Abe, Takeshi Ohshima, Nguyen Tien Son, Jawad Ul-Hassan, Florian Kaiser, Joerg Wrachtrup, and Norikazu Mizuochi
    • Organizer
      The 20th International Symposium on the Physics of Semiconductors and Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 4H-SiC中シリコン空孔を用いた室温下での電気的核スピン検出2022

    • Author(s)
      西川哲理、森岡直也、阿部浩之、森下弘樹、大島武、水落憲和
    • Organizer
      第83回応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Room-temperature electrical detection of nuclear spins in silicon carbide2022

    • Author(s)
      Naoya Morioka, Tetsuri Nishikawa, Hiroshi Abe, Hiroki Morishita, Takeshi Ohshima, and Norikazu Mizuochi
    • Organizer
      5th International Forum on Quantum Metrology and Sensing
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 室温下でSiC中の単一スピン情報の電気的読み出しを実現

    • URL

      https://www.kyoto-u.ac.jp/ja/research-news/2025-04-16

    • Related Report
      2024 Annual Research Report

All 2026

  • 炭化ケイ素中単一シリコン空孔の光電流スピン検出に関する実験・シミュレーションのデータ2026

    • Funder
      • Funder Name
        Japan Society For The Promotion Of Science
      • e-Rad_funder
        1025
      • Identifier of Crossref Funder Registry

        https://doi.org/10.13039/501100001691

      • Japan Grant Number
        JP23K22796
      • Project Name
        SiC欠陥スピンの電気的高効率読出の確立に向けたスピン・光・電荷ダイナミクス解明
    • Title
      炭化ケイ素中単一シリコン空孔の光電流スピン検出に関する実験・シミュレーションのデータ
    • Issued Date
      2026-04-06
    • Abstract
      4H-SiC中の単一シリコン空孔V2の光電流検出およびスピン検出の実験データおよびシミュレーションデータ
    • Research Field
      自然科学一般
    • Data Type
      dataset
    • Data Utilization and Provision Policy
      https://creativecommons.org/licenses/by/4.0/
    • Access Rights Type
      open access
    • Repository Information
      京都大学学術情報リポジトリ
    • URI

      https://repository.kulib.kyoto-u.ac.jp/dspace/handle/2433/293303

    • DOI

      10.57723/kds587378

    • Contributor
      • Contributor Type
        Data Manager
      • Contributor Name
        化学研究所 無機フォトニクス材料研究領域
      • Contributor Type
        Hosting Institution
      • Contributor Name
        京都大学
      • Contributor Type
        Contact Of Data Manager
      • Contributor Name
        morioka.naoya.8j*kyoto-u.ac.jp (メールアドレスは「@」を「*」に置換しています。)
    • Data No.

      JP23K22796-2024-0001

    • Related Report
      2024 Annual Research Report

URL: 

Published: 2022-04-19   Modified: 2026-04-14  

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