NMR study of high Tc cuprate superconductors with the T' structure
Project/Area Number |
18K03505
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
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Research Institution | Chiba University |
Principal Investigator |
Fukazawa Hideto 千葉大学, 大学院理学研究院, 准教授 (90361443)
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Co-Investigator(Kenkyū-buntansha) |
小堀 洋 千葉大学, 大学院理学研究院, 名誉教授 (10153660)
川股 隆行 東北大学, 工学研究科, 助教 (00431601)
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Project Period (FY) |
2018-04-01 – 2022-03-31
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Project Status |
Completed (Fiscal Year 2021)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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Keywords | 核磁気共鳴 / 高温超伝導 / 擬ギャップ / 低温物理学 / 反強磁性ゆらぎの抑制 / d波超伝導 / 超伝導 / 銅酸化物 |
Outline of Final Research Achievements |
In T'-PLCCO and T'-LECOF, the phase diagram of the wide-dope region was clarified for the first time from the viewpoint of NMR. The symmetry of the phase diagram with the hole-dope cuprates was found in the optimum and over dope region. In addition, the pseudogap phenomenon was observed for the first time from the viewpoint of NMR. Similar to the hole-doped cuprates, the symmetry of superconductivity was found to be a spin singlet state with line nodes, that is, d-wave. Furthermore, it was revealed that the antiferromagnetic correlation becomes stronger toward the lower doping region, and that a magnetic quantum phase transition point exists in T'-PLCCO.
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Academic Significance and Societal Importance of the Research Achievements |
銅酸化物高温超伝導体の研究の歴史は30年を優に越えた。それにも関わらず、これまでに電子ドープ型においては、NMRの観点から擬ギャップ現象の報告例はなかった。擬ギャップ現象は他の研究手段でも観測されてきたが特性温度は異なっており、これがどのような意味を持つのか、新たな問題を提起出来たと考えている。
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Report
(5 results)
Research Products
(30 results)
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[Journal Article] 63,65Cu, 139La-NMR study of Electron-doped High Temperature Cuprate Superconductor T'-La1.8Eu0.2CuO4-yFy2022
Author(s)
H. Fukazawa, Y. Lee, M. Watai, K. Tamura, T. Ohama, Y. Kohori, T. Sunohara, K. Shiosaka, R. Nagaoka, T. Kawamata and Y. Koike
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Journal Title
J. Phys.: Conf. Ser.
Volume: 2164
Pages: 012003-012003
Related Report
Peer Reviewed
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[Journal Article] Pseudogap Behavior in T'-Pr1.3-xLa0.7CexCuO4 Revealed by 63,65Cu NMR2020
Author(s)
Yongsun Lee, Hideto Fukazawa, Shuhei Kanamaru, Masahiro Yamamoto, Yoh Kohori, Akira Takahashi, Takayuki Kawamata, Koki Kawabata, Kazuki Tajima, Tadashi Adachi, and Yoji Koike
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Journal Title
Journal of the Physical Society of Japan
Volume: 89
Issue: 7
Pages: 073709-073709
DOI
Related Report
Peer Reviewed
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[Presentation] 電子ドープ型銅酸化物高温超伝導体T’-Pr1.3-xLa0.7CexCuO4(x = 0.05)のNMR2022
Author(s)
Lee Yongsun, 田村昂磨, 深澤英人, 大濱哲夫, 小堀洋, 永久保侑祐, 田島一輝, 川端公貴, 高橋晶, 川股隆行, 足立匡, 小池洋二
Organizer
日本物理学会
Related Report
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[Presentation] 63,65Cu,139La-NMR study of Electron-doped High Temperature Superconducting Cuprates2021
Author(s)
Yongsun Lee, Masaki Watai, Hideto Fukazawa, Tetsuo Ohama, Yoh Kohori, Akira Takahashi, Toshiki Sunohara, Kota Shiosaka, Takayuki Kawamata, Koki Kawabata, Kazuki Tajima, Tadashi Adachi and Yoji Koike
Organizer
Meaterials Research Meeting 2021
Related Report
Int'l Joint Research
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[Presentation] 電子ドープ型銅酸化物高温超伝導体T’-Pr1.7-xLa0.3CexCuO4のNMRによる研究2021
Author(s)
Lee Yongsun, 渡井将希, 金丸周平, 後藤雅人, 深澤英人, 小堀洋, 高橋晶, 川股隆行, 川端公貴, 田島一輝, 足立匡, 小池洋二
Organizer
日本物理学会第76回年次大会(2021年)
Related Report
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[Presentation] Suppression of Antiferromagnetic Spin Fluctuations by Electron Doping in T’-Pr1.3-xLa0.7CexCuO4 Probed by NMR2019
Author(s)
H. Fukazawa, YS. Lee, S. Kanamaru, M. Goto, Y. Kohori, A. Takahashi, T. Kawamata, K. Kawabata, K. Tajima, T. Adachi, and Y. Koike
Organizer
Research Frontier of Advanced Spectroscopies for Correlated Electron Systems
Related Report
Int'l Joint Research
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[Presentation] Pseudogap behavior in T'-Pr1.3-xLa0.7CexCuO4 (x = 0.10) probed by NMR2019
Author(s)
YS. Lee, M. Watai, S. Kanamaru, M. Goto, H. Fukazawa, Y. Kohori, A. Takahashi, T. Kawamata, K. Kawabata, K. Tajima, T. Adachi, and Y. Koike
Organizer
SNS2019(Spectroscopies in Novel Superconducors)
Related Report
Int'l Joint Research
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[Presentation] 電 子ドープ型高温超伝導体の NMR による研究2019
Author(s)
深澤英人, Yongsun Lee, 渡井将希, 金丸周平, 後藤雅人, 小堀洋, 高橋晶, 川股隆行, 川端公貴, 田島一輝, 足立匡, 小池洋二
Organizer
高温超伝導フォーラム第7回会合
Related Report
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[Presentation] 電子ドープ型高温超伝導体T’-Pr1.3-xLa0.7CexCuO4+δの63,65Cu,139La-NMR II2019
Author(s)
Yongsun Lee, 渡井将希, 金丸周平, 後藤雅人, 深澤英人, 小堀洋, 高橋晶, 川股隆行, 川端公貴, 田島一輝, 足立匡, 小池洋二
Organizer
日本物理学会2019年秋季大会
Related Report
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[Presentation] T'-Pr1.3-xLa0.7CexCuO4のNMR2019
Author(s)
Yongsun Lee, 渡井将希, 金丸周平, 後藤雅人, 深澤英人, 小堀洋, 高橋晶, 川股隆行, 川端公貴, 田島一輝, 足立匡, 小池洋二
Organizer
科研費合同研究会
Related Report
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[Presentation] 電子ドープ型高温超伝導体 T’-Pr1.3-xLa0.7CexCuO4+dの63,65Cu,139La-NMR2019
Author(s)
金丸周平, Lee Yongsun, 後藤雅人, 深澤英人, 小堀洋, 高橋晶, 川股隆行, 川端公貴, 田島一輝, 足立匡, 小池洋二
Organizer
日本物理学会
Related Report
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