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Development of heavily impurity doped Q-carbon high-Tc superconductor by an adjusted pulsed laser annealing technique

Research Project

Project/Area Number 21H01624
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionOkayama University

Principal Investigator

Muraoka Yuji  岡山大学, 異分野基礎科学研究所, 准教授 (10323635)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2023: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
KeywordsQ-カーボン / ホウ素ドープ / ダイヤモンドライクカーボン / YAGレーザー / 放射光光電子分光 / 金属化 / 計算科学 / 電子状態 / Qカーボン / 超伝導 / 調節パルスレーザーアニール法 / アモルファス炭素膜 / パルスレーザーアニール / ホウ素 / 高温超伝導 / X線磁気円二色性 / 急冷速度 / 高濃度不純物ドープ / 膜厚 / ラマン散乱測定 / sp3
Outline of Research at the Start

本研究では、ホウ素ドープ量の制御されたQカーボンを作製し、高温超伝導を実現する。試料作製に、申請者が見出した非平衡プロセス内で熱制御ができる調節パルスレーザーアニール(調節PLA)法を用いる。これにより、高濃度領域までのホウ素ドープ達成と超伝導転移温度 Tc = 100 K超の高温超伝導発現を実現する。電子状態の立場からホウ素ドープQカーボンにおける高温超伝導発現の検証およびn型アモルファスQカーボン超伝導体の開発も行う。

Outline of Final Research Achievements

To prepare boron-doped Q-carbon superconductors, we first determined the thickness of the diamond-like carbon film used as the staring material. Considering that the thickness of the sp2-rich layer formed on the film surface increases with film thickness, we determined that a film thickness of about 200 nm is appropriate for the preparation of Q-carbon. By preparing films using a YAG laser system, we demonstrated that Q-carbon can be obtained by the pulsed laser annealing (PLA) method even with a laser with a wavelength of 355 nm. We fabricated boron-doped Q-carbon, and obtained results suggesting from the synchrotron radiation photoelectron spectroscopy measurements that the prepared film is metallic at room temperature. We also studied the properties of amorphous carbon using computational science and clarified the growth process of amorphous carbon films and that boron doping functions as a p-type acceptor.

Academic Significance and Societal Importance of the Research Achievements

本研究により、Q-カーボンを作製するためには原料膜の膜厚はホウ素ドープQカーボン超伝導作製の重要な基礎情報として機能する。また、波長355 nmのYAGレーザーシステムでもQカーボンを作製したことで、レーザーの波長には選択の余地があることを示した。金属化を示唆するホウ素ドープQカーボンの形成は、ホウ素ドープQカーボン超伝導体の実現は可能であることを示している。本研究はまた、YAGレーザーシステムによる調節PLA法が非平衡プロセスの制御およびホウ素ドープQカーボン超伝導体の作製に有効であることも示している。計算科学の立場から高濃度ホウ素ドープが金属化への設計指針であることを明示した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (37 results)

All 2024 2023 2022 2021 Other

All Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 1 results) Presentation (24 results) (of which Int'l Joint Research: 4 results,  Invited: 5 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] First-principles molecular dynamics simulations for the properties of boron-doped tetrahedral amorphous carbon2024

    • Author(s)
      Yue Qiang、Yokoya Takayoshi、Muraoka Yuji
    • Journal Title

      Diamond and Related Materials

      Volume: 143 Pages: 110894-110894

    • DOI

      10.1016/j.diamond.2024.110894

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Self-organized vertical multilayer structures in spinodally decomposed TiO2-VO2 films on glass substrates2023

    • Author(s)
      Muraoka Yuji、Takeda Kazutada、Takemoto Yoshito、Wakita Takanori、Yokoya Takayoshi
    • Journal Title

      Thin Solid Films

      Volume: 769 Pages: 139749-139749

    • DOI

      10.1016/j.tsf.2023.139749

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Molecular dynamics simulation of deposition of amorphous carbon films on sapphire surfaces2023

    • Author(s)
      Yue Qiang、Yokoya Takayoshi、Muraoka Yuji
    • Journal Title

      Diamond and Related Materials

      Volume: 140 Pages: 110514-110514

    • DOI

      10.1016/j.diamond.2023.110514

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photoelectron holographic evidence for the incorporation site of Se and suppressed atomic displacement of the conducting layer of La(O,F)BiSSe2023

    • Author(s)
      Li YaJun、Sun ZeXu、Kataoka Noriyuki、Setoguchi Taro、Hashimoto Yusuke、Takeuchi Soichiro、Koga Shunjo、Hoshi Kazuhisa、Mizuguchi Yoshikazu、Matsushita Tomohiro、Wakita Takanori、Muraoka Yuji、Yokoya Takayoshi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 62 Issue: 12 Pages: 125001-125001

    • DOI

      10.35848/1347-4065/ad079b

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modulation of insulator metal transition of VO2 films grown on Al2O3 (001) and TiO2 (001) substrates by the crystallization of capping Ge2Sb2Te5 layer,2023

    • Author(s)
      Takuto Ohnuki, Kunio Okimura, Reki Nakamoto, Yuji Muraoka, Joe Sakai and Masashi Kuwahara
    • Journal Title

      Journal of Applied Physics

      Volume: 134 Issue: 24 Pages: 245302-245302

    • DOI

      10.1063/5.0176810

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photoelectron Holography Study of La(O,F)BiS<sub>2</sub>2023

    • Author(s)
      Li YaJun、Sun ZeXu、Kataoka Noriyuki、Setoguchi Taro、Hashimoto Yusuke、Takeuchi Soichiro、Koga Shunjo、Demura Satoshi、Noguchi Kanako、Sakata Hideaki、Mizuguchi Yoshikazu、Matsushita Tomohiro、Wakita Takanori、Muraoka Yuji、Yokoya Takayoshi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 92 Issue: 4 Pages: 044801-044801

    • DOI

      10.7566/jpsj.92.044801

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Strain relaxation and spinodal decomposition in composition adjusted TiO2-VO2 films on TiO2(100) substrates2022

    • Author(s)
      Fukuda Takahiro、Takemoto Yoshito、Wakita Takanori、Yokoya Takayoshi、Muraoka Yuji
    • Journal Title

      Thin Solid Films

      Volume: 751 Pages: 139210-139210

    • DOI

      10.1016/j.tsf.2022.139210

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Incorporation Site and Valence State of Sn Atoms in Sn-Substituted La(O,F)BiS<sub>2</sub> Superconductor2022

    • Author(s)
      Li YaJun、Sun ZeXu、Kataoka Noriyuki、Setoguchi Taro、Hashimoto Yusuke、Takeuchi Soichiro、Koga Shunjo、Muro Takayuki、Demura Satoshi、Noguchi Kanako、Sakata Hideaki、Matsushita Tomohiro、Kawasaki Ikuto、Fujimori Shin-ichi、Wakita Takanori、Muraoka Yuji、Yokoya Takayoshi
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 5 Pages: 054602-054602

    • DOI

      10.7566/jpsj.91.054602

    • Related Report
      2022 Annual Research Report 2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnetic-Field-Induced Insulator Metal Transition of W-doped VO<sub>2</sub> Observed by Electromagnetic Flux Compression at ISSP2022

    • Author(s)
      Matsuda Yasuhiro H.、Muraoka Yuji、Nakamura Daisuke、Ikeda Akihiko、Ishii Yuto、Zhou Xu-Guang、Sawabe Hironobu、Takeyama Shojiro
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 10 Pages: 101008-101008

    • DOI

      10.7566/jpsj.91.101008

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Anomalously large spin-dependent electron correlation in the nearly half-metallic ferromagnet CoS22022

    • Author(s)
      H. Fujiwara, K. Terashima, J. Otsuki, N. Takemori、H. O. Jeschke、T. Wakitai、Y. Yano、W. Hosoda、N. Kataoka、A. Teruya、M. Kakihana、M. Hedo、T. Nakama、Y. Onuki、K. Yaji、A. Harasawa、K. Kuroda、S. Shin、K. Horiba、H. Kumigashira、Y. Muraoka、T. Yokoya
    • Journal Title

      Physical Review B

      Volume: 106 Issue: 8 Pages: 085114-085114

    • DOI

      10.1103/physrevb.106.085114

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] XPS study on the boron-doped amorphous carbon films2024

    • Author(s)
      Yuji Muraoka, Kota Matsuo, Takanori Wakita and Takayoshi Yokoya
    • Organizer
      The 28th Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マイカ基板を用いたTiO2-VO2系スピノーダル分解膜の作製2024

    • Author(s)
      村岡祐治、西川僚馬、脇田高徳、横谷尚睦
    • Organizer
      第71回応用物理学会春季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] V1-xWxO2/MgF2(001)における面内格子歪2023

    • Author(s)
      村岡祐治、中原隼人、脇田高徳、横谷尚睦
    • Organizer
      2023年度 応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] サファイア基板上に堆積した非晶質炭素膜内部の結合状態2023

    • Author(s)
      榎本奨、村岡祐治、岳強、岡崎宏之、脇田高徳、横谷尚睦
    • Organizer
      2023年度 応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] X線光電子分光による非結晶カーボン膜内部の化学結合状態の評価2023

    • Author(s)
      村岡祐治、榎本奨、岳強、岡崎宏之、脇田高徳、横谷尚睦
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] TiO2(001)基板上のVO2薄膜における成膜条件と格子歪の関係2023

    • Author(s)
      村岡祐治、中本歴、脇田高徳、横谷尚睦
    • Organizer
      第84回応用物理学会秋季学術講演会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Self-assemble formation of vertical multilayer structures via spinodal decomposition in TiO2-VO2 films on glass substrates2023

    • Author(s)
      Y. Muraoka, K. Takeda, Y. Takemoto, T. Wakita, and T. Yokoya
    • Organizer
      MRM2023/IUMRS-ICA2023 Grand Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Al2O3基板上の非晶質炭素膜における sp3 割合の膜厚依存性2022

    • Author(s)
      村岡祐治、金山大志、岳強、脇田高徳、横谷尚睦
    • Organizer
      応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ガラス基板上におけるTiO2-VO2系スピノーダル分解膜の形成2022

    • Author(s)
      村岡祐治、竹田一匡、脇田高徳、横谷尚睦
    • Organizer
      応用物理・物理系学会中国四国支部合同学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 「Qカーボン」でエネルギー・環境問題に挑む2022

    • Author(s)
      村岡祐治
    • Organizer
      岩国ロータリークラブ
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] スピノーダル分解によるガラス基板上へのTiO2-VO2多層膜の形成2022

    • Author(s)
      村岡祐治、竹田一匡、脇田高徳、横谷尚睦
    • Organizer
      第83回応用物理学会 秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] サファイア基板上に作製した非晶質カーボン膜における膜厚と sp3 割合の関係2022

    • Author(s)
      村岡祐治、金山大志、岳強、脇田高徳、横谷尚睦
    • Organizer
      第83回応用物理学会 秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] エネルギー・環境分野における次世代炭素材料2022

    • Author(s)
      村岡祐治
    • Organizer
      次世代材料特集 第12回 大学発シーズ マッチングセミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 新規機能性炭素膜の開発2022

    • Author(s)
      村岡祐治
    • Organizer
      第18回酸化グラフェンナノシートシンポジウム
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 相分離を活用した酸化物ナノ構造材料膜の開発2022

    • Author(s)
      村岡祐治
    • Organizer
      日本材料学会 マテリアルズ・インフォマティクス基礎研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Characterization of amorphous carbon films by X-ray magnetic circular dichroism2022

    • Author(s)
      Yuji Muraoka, Takanori Wakita and Takayoshi Yokoya
    • Organizer
      The 27th Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Photoemission spectroscopy measurements for phase-separated TiO2-VO2 films on mica substrates2022

    • Author(s)
      Yuji Muraoka, Takanori Wakita and Takayoshi Yokoya
    • Organizer
      The 27th Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 相分離を活用したナノ構造膜の作製2022

    • Author(s)
      村岡祐治
    • Organizer
      日本表面真空学会 SP部会第174回定例研究会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] MgF2(001)基板上に作製したWドープVO2薄膜の金属-絶縁体転移2022

    • Author(s)
      村岡祐治、中原隼人、脇田高徳、横谷尚睦
    • Organizer
      第68回応用物理学会 春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Al2O3表面上に非晶質炭素成長への分子動力学シミュレーション2022

    • Author(s)
      YUE QIANG、金山大志、松尾航太、西川僚馬、中本歴、横谷尚睦、村岡祐治
    • Organizer
      第83回応用物理学会 秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ホウ素ドープ非晶質炭素体の特性に関する第一原理分子動力学計算2022

    • Author(s)
      YUE QIANG、金山大志、松尾航太、西川僚馬、中本歴、横谷尚睦、村岡祐治
    • Organizer
      第68回応用物理学会 春季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] TiO2-RuO2エピタキシャル膜におけるスピノーダル分解2021

    • Author(s)
      村岡祐治、河原拓海、脇田高徳、横谷尚睦、竹元嘉利
    • Organizer
      第82回応用物理学会 秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] XPS study on DCL films with various film thickness2021

    • Author(s)
      Yuji Muraoka, Takanori Wakita and Takayoshi Yokoya
    • Organizer
      The 26th Hiroshima International Symposium on Synchrotron Radiation
    • Related Report
      2021 Annual Research Report
  • [Presentation] ガラス基板を用いたTiO2-VO2系相分離膜の作製2021

    • Author(s)
      村岡祐治、竹田一匡、脇田高徳、横谷尚睦
    • Organizer
      第69回応用物理学会 春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Remarks] 研究室ホームページ

    • Related Report
      2023 Annual Research Report
  • [Remarks] 新炭素材料Qカーボンでエネルギー・環境問題に挑戦

    • URL

      https://www.okayama-u.ac.jp/up_load_files/press_r4/press20220527-2.pdf

    • Related Report
      2022 Annual Research Report
  • [Patent(Industrial Property Rights)] 2021-2141622021

    • Inventor(s)
      2021
    • Industrial Property Rights Holder
      2021
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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