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Novel fact on the mechanisms of high-temperature superconductivity

Research Project

Project/Area Number 19H02580
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionNiigata University

Principal Investigator

Sasaki Susumu  新潟大学, 自然科学系, 准教授 (80323955)

Co-Investigator(Kenkyū-buntansha) 下山 淳一  青山学院大学, 理工学部, 教授 (20251366)
大野 義章  新潟大学, 自然科学系, 教授 (40221832)
椋田 秀和  大阪大学, 基礎工学研究科, 准教授 (90323633)
渡邉 信嗣  金沢大学, ナノ生命科学研究所, 准教授 (70455864)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
Keywords高温超伝導 / 鎖構造誘起超伝導 / Pr247 / Cu核スピン / 核スピン / 擬一次元構造 / 低次元電子物性 / 核磁気共鳴 / 銅酸化物 / 超伝導発現機構 / 鎖構造 / 平面構造 / ヘリウムリサイクル / 超高感度核スピン計測
Outline of Research at the Start

いわゆる高温超伝導では「銅と酸素からなる平面構造が超伝導を誘起する」という定説がある。一方,ごく少数ではあるが「鎖構造こそが超伝導を誘起する。平面構造は絶縁状態である」との報告もある。これまで我々は,独自に構築し改良してきた装置を用いて,物質中の核スピンの応答信号から(核スピン計測)様々な物質の不思議を解明してきた。これに加えて,ごく最近,鎖構造誘起と目される物質の完全な超伝導化に成功した。この両者を組み合わせることで,高温超伝導発現の新事実,すなわち鎖構造が誘起する超伝導現象を実証する。これにより,超伝導発現のしくみに革新的な新機軸を打ち立てるとともに,新規の超伝導物質開発の新指針とする。

Outline of Final Research Achievements

So far, it has been widely believed that the superconductivity in cuprates is driven by CuO2 planes. On the other hand, there were some repots that, for a Pr-based superconductor Pr247, the superconductivity is not driven by the planes but the double chains. In the first year of this research period, we clarified that, for Pr-based Pr247, the Cu nuclear spins in planes are in an insulating state, indicating clearly that the planes do not contribute to the superconductivity. In the 2nd and 3rd year, we found out that, from the temperature dependence of Cu-T1, the double chains drive the superconductivity whereas the planes do not show superconductivity.

Academic Significance and Societal Importance of the Research Achievements

高温超伝導の発現機構について35年にわたる定説,すなわち「銅と酸素から構成される平面構造が超伝導の駆動源である」を超える,まったく新しい機構,すなわち「平面構造は絶縁状態のままで,鎖構造が超伝導の駆動源である」との新事実を実験的に明確に示した。これにより,平面構造にこだわらずに新規の超伝導物質を開発する指針を得たことを意味する。また,擬一次元構造が駆動する超伝導であることから,世界中の著名な理論家の興味の対象となりつつある。

Report

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

    (36 results)

All 2022 2021 2020 2019 Other

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 3 results) Presentation (21 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results) Remarks (5 results) Patent(Industrial Property Rights) (2 results) (of which Overseas: 1 results)

  • [Journal Article] Nuclear-spin evidence of insulating and antiferromagnetic state of CuO2 planes in superconducting Pr2Ba4Cu7O15-δ2022

    • Author(s)
      Nishioka Sotaro、Sasaki Susumu、Nakagawa Shunsaku、Yashima Mitsuharu、Mukuda Hidekazu、Yogi Mamoru、Shimoyama Jun-ichi
    • Journal Title

      Applied Physics Express

      Volume: 15 Issue: 2 Pages: 0230011-0230014

    • DOI

      10.35848/1882-0786/ac4533

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 物性研究者のためのMRI入門-物理学者からみた撮像の原理2021

    • Author(s)
      佐々木進,Dwi Prananto
    • Journal Title

      固体物理

      Volume: 56 Pages: 735-744

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis of thick YBCO films up to 3.0 μm on metallic substrates by a fluorine-free metal organic decomposition method2019

    • Author(s)
      Ikeda S、Motoki T、Gondo S、Nakamura S、Honda G、Nagaishi T、Doi T、Shimoyama J
    • Journal Title

      Superconductor Science and Technology

      Volume: 32 Issue: 11 Pages: 115003-115003

    • DOI

      10.1088/1361-6668/ab3d92

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Formation of defects and their influence on inter- and intra-granular current in sintered polycrystalline 122 phase Fe-based superconductors2019

    • Author(s)
      Shimada Yusuke、Yamamoto Akiyasu、Hayashi Yujiro、Kishio Kohji、Shimoyama Jun-ichi、Hata Satoshi、Konno Toyohiko J
    • Journal Title

      Superconductor Science and Technology

      Volume: ー Issue: 8 Pages: 084003-084003

    • DOI

      10.1088/1361-6668/ab0eb6

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The MIRAI Program and the New Super-High Field NMR Initiative and Its Relevance to the Development of Superconducting Joints in Japan2019

    • Author(s)
      Maeda Hideaki、Shimoyama Jun-ichi、Yanagisawa Yoshinori、Ishii Yoshitaka、Tomita Masaru
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 29 Issue: 5 Pages: 1-9

    • DOI

      10.1109/tasc.2019.2905360

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Unique defect structure and advantageous vortex pinning properties in superconducting CaKFe4As42019

    • Author(s)
      S. Ishida, A. Iyo, H. Ogino, H. Eisaki, N. Takeshita, K. Kawashima, K. Yanagisawa, Y. Kobayashi, K. Kimoto, H. Abe, M. Imai, J. Shimoyama, and M. Eisterer
    • Journal Title

      npj Quantum Materials

      Volume: 4 Issue: 1 Pages: 27-27

    • DOI

      10.1038/s41535-019-0165-0

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] High I c superconducting joint between Bi2223 tapes2019

    • Author(s)
      Takeda Yasuaki、Motoki Takanori、Kitaguchi Hitoshi、Nakashima Takayoshi、Kobayashi Shin-ichi、Kato Takeshi、Shimoyama Jun-ichi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 2 Pages: 023003-023003

    • DOI

      10.7567/1882-0786/aaf8b4

    • NAID

      210000135566

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Promotion of Epitaxial Growth and Enhanced Jc by Coaddition of Br and Metals (Zr, Sn, Hf) to the Fluorine-Free MOD Processed YBCO Films2019

    • Author(s)
      T. Motoki, S. Ikeda, S. Gondo, S. Nakamura, G. Honda, T. Nagaishi, T. Doi, and J. Shimoyama
    • Journal Title

      IEEE Transactions on Applied Superconductivity

      Volume: 29 Issue: 5 Pages: 6600804-6600804

    • DOI

      10.1109/tasc.2019.2898552

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] Pr2Ba4Cu7O15-δの超伝導III:二重鎖が超伝導である実験的証拠2022

    • Author(s)
      西岡 颯太郎,中川 俊作、八島 光晴、椋田 秀和、與儀 護、池田 宏輔,Prananto Dwi、佐々木 進、下山 淳一
    • Organizer
      第69回 応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Pr2Ba4Cu7O15-δ超伝導における 63/65Cu-NQR によるスピンー格子緩和率測定2022

    • Author(s)
      中川 俊作,西岡 颯太郎,八島 光晴,椋田 秀和, 與儀 護,池田 宏輔 ,Dwi Prananto,佐々木 進 ,下山 淳一
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Intrinsic Noise Spectrum Is Given by both the Hahn-Echo T2 and the Spectral Intensities Properly Derived from Multiple Spin-Echo Decays2022

    • Author(s)
      Susumu Sasaki
    • Organizer
      Condensed Matter Physics Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] NQR Evidence of Superconductivity in Pr2Ba4Cu7O15-δ : No Contribution of CuO2 Planes but Driven by Double Chains2022

    • Author(s)
      Susumu Sasaki
    • Organizer
      Max-Planck Institute Workshop
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Pr2Ba4Cu7O15-δの超伝導II: CuO2面が超伝導に寄与しない実験的証拠2021

    • Author(s)
      西岡 颯太郎 , 中川 俊作 , 八島 光晴 , 椋田 秀和 , 與儀 護 , 池田 宏輔 , プラナント ドウイ , 佐々木 進 , 下山 淳一
    • Organizer
      第82回 応用物理学会秋季学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Direct Observation of Spontaneous Polarization in Freestanding GaN Substrate2021

    • Author(s)
      Susumu Sasaki, Takuya Sekikawa, Dwi Prananto, Yusuke Mori, Maki Kushimoto, Hiroshi Amano and Kenji Shiraishi
    • Organizer
      International Conference of Materials and System for Sustainability
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CPMG Does Not Give T2 But Generalized Coherence Time2021

    • Author(s)
      Susumu Sasaki, Takuya Sekikawa, Tatsuro Yuge, Yoshiro Hirayama
    • Organizer
      International Symposium of Magnetic Resonance
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nuclear-Spin Evidence of Superconductivity in Pr2Ba4Cu7O15-δ : No Contribution of CuO2 Planes2021

    • Author(s)
      Sotaro Nishioka, Shunsaku Nakagawa, Mitsuharu Yashima, Hidekazu Mukuda, Mamoru Yogi, Susumu Sasaki, Jun-ichi Shimoyama
    • Organizer
      Materials Research Meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pr2Ba4Cu7O15-δ純良結晶における二重鎖超伝導相のNQR/NMRによる検証2021

    • Author(s)
      西岡 颯太郎,中川 俊作,八島 光晴,椋田 秀和, 與儀 護,池田 宏輔,Dwi Prananto,佐々木 進,下山 淳一
    • Organizer
      日本物理学会2021年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高温超伝導発現の新事実: CuO2面が超伝導に寄与しない実験的証拠2021

    • Author(s)
      西岡颯太郎,中川俊作,八島光晴,椋田秀和, 與儀 護,池田 宏輔,Dwi Prananto,佐々木 進,下山 淳一
    • Organizer
      超伝導・トポロジカル物質研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高温超伝導発現の新事実: CuO2面が絶縁状態である実験的証拠2021

    • Author(s)
      西岡颯太郎,中川俊作,八島光晴,椋田秀和, 與儀 護,池田 宏輔,Dwi Prananto,佐々木 進,下山 淳一
    • Organizer
      京都大学基礎物理学研究所研究会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Pr2Ba4Cu7O15-δの超伝導: CuO2面が超伝導に寄与しない実験的証拠2021

    • Author(s)
      西岡颯太郎;中川俊作;八島光晴;椋田秀和;與儀護;池田 宏輔;Dwi Prananto;佐々木進;下山 淳一
    • Organizer
      第68回応用物理学会春季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Pr2Ba4Cu7O15-δ純良結晶における 二重鎖超伝導相のNQR/NMRによる検証2021

    • Author(s)
      西岡 颯太郎;中川 俊作;八島 光晴;椋田 秀和;與儀 護;池田 宏輔;Dwi Prananto;佐々木 進;下山 淳一
    • Organizer
      日本物理学会2021年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] いかにして多重スピンエコーから雑音スペクトルを抽出するか?2020

    • Author(s)
      佐々木進,三浦敬典,池田宏輔,坂井祐大,関川卓也,齋藤雅樹,弓削達郎,平山祥郎
    • Organizer
      第67回 応用物理学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] In-vivo 23Na-MRI of mice toward renal clinical applications2019

    • Author(s)
      Tomoyuki Haishi, Ryohei Kaseda, Ichiei Narita, Susumu Sasaki
    • Organizer
      NMR**2 Spring meeting
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Direct Observation of Spontaneous Polarization in Freestanding GaN Substrate Through Nuclear Magnetic Resonance2019

    • Author(s)
      Susumu Sasaki, Ryo Kusanagi, Kohei Suzuki, Yusuke Mori, Maki Kushimoto, Hiroshi Amano, Kenji Shiraishi
    • Organizer
      SSDM2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] How should we define the spectral intensity from multiple spin-echo decays?2019

    • Author(s)
      Susumu Sasaki
    • Organizer
      9th Spin Camp
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] マウス腎疾患モデルの生体内ナトリウムを可視化する23Na-MRIの開発2019

    • Author(s)
      拝師智之,忰田亮平,成田一衛,佐々木進
    • Organizer
      第47回日本磁気共鳴医学会大会(熊本)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Direct Observation of Spontaneous Polarization in Freestanding GaN Substrate2019

    • Author(s)
      Susumu Sasaki, Yusuke Mori, Maki Kushimoto, Hiroshi Amano, Kenji Shiraishi
    • Organizer
      第58回NMR討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 9.4Tesla-MRIを用いて生体マウス腎臓のナトリウム分布を可視化する2019

    • Author(s)
      拝師智之,忰田亮平,成田一衛,佐々木進
    • Organizer
      第58回NMR討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] How should we derive the noise spectrum from multiple spin-echo decays?2019

    • Author(s)
      Susumu Sasaki, Takanori Miura, Kohsuke Ikeda, Masahiro Sakai, Takuya Sekikawa, Masaki Saito, Tatsuro Yuge, Yoshiro Hirayama
    • Organizer
      HQS2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] 従来の定説を超える超伝導-独自の超高感度装置で実証-

    • URL

      https://www.niigata-u.ac.jp/news/2022/99526/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 電気抵抗ゼロで絶縁体、未知の原理の「銅酸化物超電導体」が生まれた!

    • URL

      https://news.yahoo.co.jp/articles/37180524f2ae899a232dd1cf0a4951cbf0d80cad

    • Related Report
      2021 Annual Research Report
  • [Remarks] 日本医療研究開発機構 先端計測技術

    • URL

      https://www.amed.go.jp/koubo/02/01/0201C_00008.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] 新潟大学での大型資金プロジェクト

    • URL

      https://www.niigata-u.ac.jp/contribution/research/ability/bigproject/

    • Related Report
      2019 Annual Research Report
  • [Remarks] 新潟大学工学部材料科学プログラム 佐々木研究室

    • URL

      http://fusion.eng.niigata-u.ac.jp/index.html

    • Related Report
      2019 Annual Research Report
  • [Patent(Industrial Property Rights)] 核磁気共鳴装置、磁気共鳴イメージング装置、核磁気共鳴方法、磁気共鳴イメージング方法、測定条件を決定する方法、及びプログラム2019

    • Inventor(s)
      佐々木 進
    • Industrial Property Rights Holder
      佐々木 進
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report
    • Overseas
  • [Patent(Industrial Property Rights)] 核磁気共鳴イメージング装置、核磁気共鳴イメージング方法、及びプログラム2019

    • Inventor(s)
      佐々木 進
    • Industrial Property Rights Holder
      佐々木 進
    • Industrial Property Rights Type
      特許
    • Filing Date
      2019
    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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