Elucidation of the mechanism of the new superconductivity without doping in T'-type cuprates

• Project/Area Number: 16K05458
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Sophia University
• Principal Investigator: Adachi Tadashi 上智大学, 理工学部, 教授 (40333843)
• Research Collaborator: SUMURA takuya ; KAWABATA koki ; PARK sangeun ; BAQIYA malik anjelh ; KURASHIMA koshi ; ONISHI shusei
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 高温超伝導体 / 電子ドープ型銅酸化物 / 母物質ノンドープ超伝導 / 還元処理 / ミュオンスピン緩和 / Ｘ線吸収分光 / 単結晶 / マイスナー反磁性 / 光学反射率 / 単結晶育成 / 強相関電子系 / 超伝導材料・素子 / 低温物性 / 粒子線 / 磁性

Outline of Final Research Achievements

In order to elucidate the mechanism of superconductivity in the parent compounds of the electron-doped high-Tc cuprate superconductors with the T'-structure, we have investigated detailed changes of the electronic states through the reduction annealing from the electrical resistivity, muon spin relaxation etc. using single crystals of the T'-cuprates.
By improving the reduction annealing, we have succeeded in removing effectively the excess oxygen from the single crystals of the T'-cuprates. It has been clarified that not only electrons but also holes are generated through the reduction annealing in the T'-cuprates, suggesting that holes are related to the appearance of superconductivity. Moreover, it has been clarified that the Cu-spin correlation and superconductivity are in intimate relation with each other in the T'-cuprates.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果、電子ドープ型T'銅酸化物から過剰な酸素を効果的に取り除く方法を確立した。これは、他の遷移金属酸化物に対しても利用できる技術なので、様々な機能性酸化物の開発に貢献するだろう。
本研究から、T'銅酸化物において還元とともに電子状態がどのように変化するのかが明らかになった。特に、超伝導が発現する試料におけるホールキャリアの存在とCuスピン相関の発達を結論できたことは特筆に値する。今後は、元素置換によらない新たなキャリアドープ法による新規高温超伝導体の創製が発展するだろう。

Research Products

• [Int'l Joint Research] CIC nanoGUNE(スペイン)
• [Int'l Joint Research] Zavoisky Physical-Technical Institute(ロシア連邦)
• [Int'l Joint Research] コロンビア大学(米国)
• [Int'l Joint Research] カザン大学(ロシア連邦)
• [Int'l Joint Research] コロンビア大学(米国)
• [Journal Article] Magnetic field effect in stripe-ordered 214 (La1.6-xNd0.4)SrxCuO4 and La2-xBaxCuO4 superconducting cuprates studied by resonant soft x-ray scattering (2018)
  • Author(s): S. Blanco-Canosa, E. Schierle, Z. W. Li, H. Guo, T. Adachi, Y. Koike, O. Sobolev, E. Weschke, A. C. Komarek and C. Schussler-Langeheine
  • Journal Title: Physical Review B Volume: 97 Issue: 19
  • DOI: 10.1103/physrevb.97.195130
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of Ferromagnetic Fluctuations in Heavily Overdoped (Bi,Pb)2Sr2CuO6+δ Copper Oxides (2018)
  • Author(s): Kurashima Koshi、Adachi Tadashi、Suzuki Kensuke M.、Fukunaga Yasushi、Kawamata Takayuki、Noji Takashi、Miyasaka Hitoshi、Watanabe Isao、Miyazaki Masanori、Koda Akihiro、Kadono Ryosuke、Koike Yoji
  • Journal Title: Physical Review Letters Volume: 121 Issue: 5 Pages: 057002-057002
  • DOI: 10.1103/physrevlett.121.057002
  • Peer Reviewed
• [Journal Article] Impurity Effects on the Electronic State in the Undoped (Ce-Free) Superconductor T’-La1.8Eu0.2CuO4 Studied by Muon Spin Relaxation (2018)
  • Author(s): T. Kawamata, K. Ohashi, T. Takamatsu, T. Adachi, M. Kato, I. Watanabe and Y. Koike
  • Journal Title: Journal of the Physical Society of Japan Volume: 87 Issue: 9 Pages: 094717-094717
  • DOI: 10.7566/jpsj.87.094717
  • NAID: 210000134968
  • Peer Reviewed
• [Journal Article] Microwave absorption by charge density waves in La2-xSrxCuO4 (2018)
  • Author(s): I. I. Gimazov, T. Adachi, K. Omori, Y. Tanabe, Y. Koike and Yu. I. Talanov
  • Journal Title: JETP Letters Volume: 108 Issue: 10 Pages: 675-679
  • DOI: 10.1134/s0021364018220034
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Optical study of electron-doped cuprate Pr1.3-xLa0.7CexCuO4+δ in under-doped regime: Revisit the phase diagram (2018)
  • Author(s): R. Ohnishi, M. Nakajima, S. Miyasaka, S. Tajima, T. Adachi, T. Ohgi, A. Takahashi and Y. Koike
  • Journal Title: Journal of the Physical Society of Japan Volume: 87 Issue: 4 Pages: 043705-043705
  • DOI: 10.7566/jpsj.87.043705
  • NAID: 210000134778
  • Peer Reviewed
• [Journal Article] Protected vacuum annealing effect on single crystals of Pr1-xLaCexCuO4 in the overdoped regime (2017)
  • Author(s): M. A. Baqiya, B. Triono, Darminto, T. Adachi, A. Takahashi, T. Konno, M. Watanabe, T. Prombood and Y. Koike
  • Journal Title: Materials Science and Engineering Volume: 196 Pages: 012011-012011
  • DOI: 10.1088/1757-899x/196/1/012011
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Novel electronic state and superconductivity in the electron-doped high-Tc T'-superconductors (2017)
  • Author(s): T. Adachi, T. Kawamata and Y. Koike
  • Journal Title: Condensed Matter Volume: 2 Issue: 3 Pages: 23-23
  • DOI: 10.3390/condmat2030023
  • Peer Reviewed / Open Access
• [Journal Article] Superconducting fluctuations above the critical temperature in Bi2Sr2Ca1-xYxCuO8+δ as revealed by microwave absorption (2017)
  • Author(s): I. Gimazov, Yu. Talanov, V. Sakhin, T. Adachi, T. Noji and Y. Koike
  • Journal Title: Applied Magnetic Resonance Volume: 48 Issue: 9 Pages: 861-870
  • DOI: 10.1007/s00723-017-0912-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Undoped high-Tc superconductivity in T'-La1.8Eu0.2CuO4+δ revealed by 63,65Cu and 139La NMR: Bulk superconductivity and antiferromagnetic fluctuations (2017)
  • Author(s): H. Fukazawa, S. Ishiyama, M. Goto, S. Kanamaru, K. Ohashi, T. Kawamata, T. Adachi, M. Hirata, T. Sasaki, Y. Koike and Y. Kohori
  • Journal Title: Physica C Volume: 541 Pages: 30-35
  • DOI: 10.1016/j.physc.2017.08.002
  • Peer Reviewed
• [Journal Article] Pressure tuning of structure, superconductivity, and novel magnetic order in the Ce-underdoped electron-doped cuprate T'-Pr1.3-xLa0.7CexCuO4 (x=0.1) (2017)
  • Author(s): Z. Guguchia, T. Adachi, Z. Shermadini, T. Ohgi, J. Chang, E. S. Bozin, F. von Rohr, A. M. dos Santos, J. J. Molaison, R. Boehler, Y. Koike, A. R. Wieteska, B. A. Frandsen, E. Morenzoni, A. Amato, S. J. L. Billinge, Y. J. Uemura and R. Khasanov
  • Journal Title: Physical Review B Volume: 96 Issue: 9
  • DOI: 10.1103/physrevb.96.094515
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Reduction effects on the Cu-spin correlation in the electron-doped T'-cuprate Pr1.3-xLa0.7CexCuO4+δ (x=0.10) (2017)
  • Author(s): T. Sumura, T. Ishimoto, H. Kuwahara, K. Kurashima, Y. Koike, I. Watanabe, M. Miyazaki, A. Koda, R. Kadono and T. Adachi
  • Journal Title: JPS Conference Proceedings Volume: 21
  • DOI: 10.7566/jpscp.21.011027
  • Peer Reviewed / Open Access
• [Journal Article] μSR studies on magnetism in high-Tc cuprates (2016)
  • Author(s): Y. Koike, T. Adachi
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 9 Pages: 091006-091006
  • DOI: 10.7566/jpsj.85.091006
  • NAID: 210000134053
  • Peer Reviewed
• [Journal Article] Paring symmetry studied from impurity effects in the undoped superconductor T'-La1.8Eu0.2CuO4 (2016)
  • Author(s): K. Ohashi, T. Kawamata, T. Takamatsu, T. Adachi, M. Kato, Y. Koike
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 9 Pages: 093703-093703
  • DOI: 10.7566/jpsj.85.093703
  • Peer Reviewed
• [Journal Article] Metal-insulator transition and pseudogap in Bi1.76Pb0.35Sr1.89CuO6+δ high-Tc cuprates (2016)
  • Author(s): M. Miyazaki, R. Kadono, M. Hiraishi, A. Koda, K. M. Kojima, Y. Fukunaga, Y. Tanabe, T. Adachi, Y. Koike
  • Journal Title: Physical Review B Volume: 94 Issue: 11
  • DOI: 10.1103/physrevb.94.115123
  • Peer Reviewed
• [Journal Article] Strong electron correlation behind the superconductivity in Ce-free and Ce-underdoped high-Tc T'-cuprates (2016)
  • Author(s): T. Adachi, A. Takahashi, K. M. Suzuki, M. A. Baqiya, T. Konno, T. Takamatsu, M. Kato, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, Y. Koike
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 11 Pages: 114716-114716
  • DOI: 10.7566/jpsj.85.114716
  • NAID: 40020994923
  • Peer Reviewed
• [Journal Article] Successive magnetic transitions relating to itinerant spins and localized Cu spins in La2-xSrxCu1-yFeyO4: Possible existence of stripe correlations in the overdoped regime (2016)
  • Author(s): K. M. Suzuki, T. Adachi, H. Sato, I. Watanabe, Y. Koike
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Issue: 12 Pages: 124705-124705
  • DOI: 10.7566/jpsj.85.124705
  • NAID: 210000134194
  • Peer Reviewed
• [Journal Article] Superconducting fluctuations above critical temperature in the Bi2Sr2Ca1-xYxCu2O8 single crystals (2016)
  • Author(s): I. I. Gimazov, V. O. Sakhin, Yu. I. Talanov, T. Adachi, T. Noji, Y. Koike
  • Journal Title: Magnetic Resonance in Solids. Electronic Journal Volume: 18
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 電子ドープ型銅酸化物高温超伝導体におけるμSRから見たCuスピンゆらぎと電子状態 (2019)
  • Author(s): 足立匡
  • Organizer: 量子ビーム若手研究会／CMRCプロジェクト研究会「超伝導体とその周辺物質に対する量子ビーム研究の新展開」
  • Invited
• [Presentation] 過剰にホールドープしたBi-2201系銅酸化物における強磁性ゆらぎに対する不純物置換効果 (2019)
  • Author(s): 足立匡, 大西柊成, 川端公貴, 桑原英樹, 黒江晴彦, 渡邊功雄, 倉嶋晃士, 川股隆行, 小池洋二
  • Organizer: 2018年度量子ビームサイエンスフェスタ
• [Presentation] 単結晶Ｘ線回折によるT'-Pr1.3-xLa0.7CexCuO4+δ（x=0.10）の還元アニールによる構造変化の研究 (2019)
  • Author(s): 御手洗誠, 坂倉輝俊, 木村宏之, 浅野駿, 藤田全基, 洲村拓哉, 石本奨, 足立匡, 小池洋二, 岸本俊二
  • Organizer: 2018年度量子ビームサイエンスフェスタ
• [Presentation] MLFミュオンでプローブする高温超伝導体のスピンゆらぎ (2019)
  • Author(s): 足立匡
  • Organizer: 日本物理学会第74回年次大会
  • Invited
• [Presentation] Bi-2201系銅酸化物の超過剰ドープ領域における強磁性ゆらぎに対する磁性・非磁性不純物置換効果 (2019)
  • Author(s): 大西柊成, 川端公貴, 桑原英樹, 黒江晴彦, 渡邊功雄, 倉嶋晃士, 川股隆行, 小池洋二, 足立匡
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Nanosized effect promoting 3D hopping mechanism in La2CuO4 nanoparticles (2019)
  • Author(s): S. Winarsih, F. Budiman, H. Tanaka, T. Goto, T. Adachi, B. Kurniawan, B. Soegijono, I. Watanabe
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 光学フォノンスペクトルから見る(Pr,La,Ce)2CuO4+δの還元アニール効果 (2019)
  • Author(s): 水溜勝也, 大西諒太, 中島正道, 宮坂茂樹, 田島節子, 小池洋二, 洲村拓哉, 足立匡
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 電子ドープ型高温超伝導体T'-Pr1.3-xLa0.7CexCuO4+δの63,65Cu,139La-NMR (2019)
  • 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: 日本物理学会第74回年次大会
• [Presentation] Reduction and electron-doping effects on the Cu-spin correlation in electron-doped high-Tc cuprates Pr2-x-yLayCexCuO4+δ (2018)
  • Author(s): T. Adachi, T. Sumura, M. A. Baqiya, T. Ishimoto, H. Kuwahara, K. Kurashima, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, Y. Koike
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Reduction annealing and electronic states in single crystals of T’-cuprate Pr2CuO4+δ (2018)
  • Author(s): K. Kawabata, H. Kuwahara, T. Adachi
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Impurity effects on ferromagnetic fluctuations in heavily overdoped Bi-2201 cuprates (2018)
  • Author(s): S. Onishi, K. Kawabata, I. Watanabe, H. Kuwahara, K. Kurashima, T. Kawamata, Y. Koike, T. Adachi
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Muon's perturbation on the local spatial distribution of Cu-spin in La2CuO4 (2018)
  • Author(s): M. R. Ramadhan, I. Ramli, M. D. Umar, S. Winarsih, B. Adiperdana, B. Kurniawan, M. I. Mohamed-Ibrahim, S. Sulaiman, T. Adachi, I. Watanabe
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Reduction in Neel temperature of nanocrystalline La2CuO4 probed by μSR and NMR (2018)
  • Author(s): S. Winarsih, F. Budiman, H. Tanaka, T. Goto, T. Adachi, B. Kurniawan, I. Watanabe
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Direct observation of symmetry-distinct states with nontrivial doping evolution in a high-Tc cuprate family by polarization-dependent ARPES (2018)
  • Author(s): R.-H. He, M. Hashimoto, K. Tanaka, S.-K. Mo, A. Sorini, T. Sasagawa, M. Fujita, T. Adachi, M. Enoki, S. Iikubo, Y. He, M. Yi, N. Mannella, H. Yao, W. Meevasana, T. P. Devereaux, Y. Koike, K. Yamada, Z.Hussain, Z.-X. Shen
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] 63,65CuNMR studies of superconducting T'-La1.8Eu0.2CuO4+δ with Nd2CuO4 structure (2018)
  • Author(s): Y. Kohori, H. Fukazawa, S. Ishiyama, M. Goto, S. Kanamaru, K. Ohashi, T. Kawamata, T. Adachi, M. Hirata, T. Sasaki, Y. Koike
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Electronic state in the undoped (Ce-free) superconductor T'-La1.8Eu0.2CuO4 studied from impurity effects on muon spin relaxation (2018)
  • Author(s): T. Kawamata, K. Ohashi, T. Takamatsu, T. Adachi, I. Watanabe, M. Kato, Y. Koike
  • Organizer: 12th International Conference on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-HTSC-XII)
  • Int'l Joint Research
• [Presentation] Bi-2201系銅酸化物の超過剰ドープ領域における 強磁性ゆらぎに対するFe置換効果 (2018)
  • Author(s): 大西柊成, 川端公貴, 渡邊功雄, 桑原英樹, 黒江晴彦, 倉嶋晃士, 川股隆行, 小池洋二, 足立匡
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] T’型銅酸化物Pr2CuO4+δの単結晶における還元処理と電子状態 (2018)
  • Author(s): 川端公貴, 桑原英樹, 足立匡
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Quantum effects of muon on the electronic state of La2CuO4 (2018)
  • Author(s): M. R. Ramadhan, I. Ramli, M. D. Umar, S. Winarsih, B. Kurniawan, M. I. Mohamed-Ibrahim, S. Sulaiman, T. Adachi, I. Watanabe
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Investigation of nano-sized effects on the magnetic properties of La2CuO4 by using μSR and NMR (2018)
  • Author(s): S. Winarsih, F. Budiman, H. Tanaka, T. Goto, T. Adachi, B. Kurniawan, I. Watanabe
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] Electronic state and superconductivity in the undoped high-Tc superconductor T'-La1.8Eu0.2CuO4 (2018)
  • Author(s): Y. Koike, T. Kawamata, T. Adachi, H. Fukazawa, Y. Kohori
  • Organizer: The European Materials Research Society (E-MRS) 2018 Fall Meeting
  • Int'l Joint Research / Invited
• [Presentation] Development of ferromagnetic fluctuations in heavily overdoped high-Tc superconductors (2018)
  • Author(s): T. Adachi
  • Organizer: 4th International Conference on Functional Materials Science (ICFMS2018)
  • Int'l Joint Research / Invited
• [Presentation] 超低速ミュオンによる表面と埋もれた界面の研究 (2018)
  • Author(s): 足立匡
  • Organizer: 応用物理学会「埋もれた界面のX線・中性子解析」研究会（竹橋研究会）
  • Invited
• [Presentation] 電子ドープ型T’銅酸化物におけるμSRから見た電子状態 (2018)
  • Author(s): 足立匡
  • Organizer: 科研費合同研究会「真性T’構造銅酸化物における電子状態とノンドープ超伝導機構の解明」「中性子スピンプリズム法の確立と超伝導体の電子多自由度マルチダイナミクスの研究」
• [Presentation] 第2ターゲットステーションを用いた物質科学 (2018)
  • Author(s): 足立匡
  • Organizer: 第8回Muon科学と加速器研究
  • Invited
• [Presentation] ミュオンを用いた物質科学の将来 (2018)
  • Author(s): 足立匡
  • Organizer: ワークショップ「高温超伝導体とその関連物質における新奇な物理」
  • Invited
• [Presentation] 過剰にホールドープしたBi-2201系銅酸化物における強磁性ゆらぎの発達 (2018)
  • Author(s): 足立匡, 倉嶋晃士, 川股隆行, 野地尚, 渡邊功雄, 宮崎正範, 幸田章宏, 門野良典, 小池洋二
  • Organizer: 2017年度量子ビームサイエンスフェスタ
• [Presentation] Bi-2201系銅酸化物の超過剰ドープ領域における強磁性ゆらぎに対する不純物置換効果 (2018)
  • Author(s): 足立匡, 大西柊成, 川端公貴, 渡邊功雄, 桑原英樹, 倉嶋晃士, 川股隆行, 小池洋二
  • Organizer: 日本物理学会第73回年次大会
• [Presentation] 過剰に還元された電子ドープ型T'銅酸化物超伝導体Pr1.3-xLa0.7CexCuO4+δ（x=0.10）におけるCuスピン相関と超伝導 (2017)
  • Author(s): 足立匡，洲村拓哉，石本奨，桑原英樹，倉嶋晃士，小池洋二，渡邊功雄，宮崎正範，幸田章宏，門野良典
  • Organizer: 2016年度量子ビームサイエンスフェスタ
  • Place of Presentation: エポカルつくば（茨城県，つくば市）
  • Year and Date: 2017-03-14
• [Presentation] Transport and muon spin relaxation studies of the novel electronic state in the electron-doped high-Tc T'-cuprates (2017)
  • Author(s): T. Adachi, A. Takahashi, M. A. Baqiya, T. Konno, T. Ohgi, T. Sumura, K. Kurashima, K. M. Suzuki, T. Takamatsu, T. Kawamata, M. Kato, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, H. Oguro, S. Awaji, Y. Koike
  • Organizer: The 37th REIMEI Workshop on Frontiers of Correlated Quantum Matters and Spintronics
  • Place of Presentation: Tokai （Japan）
  • Year and Date: 2017-01-14
  • Int'l Joint Research / Invited
• [Presentation] μSRから見たT'型銅酸化物におけるCuスピン相関と超伝導の関わり (2017)
  • Author(s): 足立匡
  • Organizer: 東北大中性子散乱物性研究グループ ワークショップシリーズ第5回「銅酸化物高温超伝導研究のフロンティアとその周辺物理」
  • Place of Presentation: 東北大学金属材料研究所（宮城県，仙台市）
  • Year and Date: 2017-01-12
  • Invited
• [Presentation] Cu-spin correlation and novel electronic state in the electron-doped high-Tc cuprates (2017)
  • Author(s): T. Adachi
  • Organizer: Workshop on “The research forefront of high-Tc cuprates”
  • Int'l Joint Research / Invited
• [Presentation] Coincident disappearance of superconductivity in La2-xSrxCu1-yMyO4 (M = Fe, Al) (2017)
  • Author(s): K. M. Suzuki, T. Adachi, M. A. Baqiya, H. Guo, I. Kawasaki, M. Abdel-Jawad, S. Yoon, I. Watanabe, Y. Koike
  • Organizer: The 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017)
  • Int'l Joint Research
• [Presentation] Over-reduction effects on the Cu-spin correlation in the electron-doped T'-cuprate Pr1.3-xLa0.7CexCuO4+δ (x = 0.10) (2017)
  • Author(s): T. Sumura, T. Ishimoto, H. Kuwahara, K. Kurashima, Y. Koike, I. Watanabe, M. Miyazaki, A. Koda, R. Kadono, T. Adachi
  • Organizer: The 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017)
  • Int'l Joint Research
• [Presentation] μSR study of the magnetism in the infinite-layer compound LaNiO2+x (2017)
  • Author(s): T. Adachi, T. Takamatsu, K. M. Suzuki, M. A. Baqiya, K. Naruse, M. Imaizumi, I. Kawasaki, I. Watanabe and Y. Koike
  • Organizer: The 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017)
  • Int'l Joint Research
• [Presentation] Enhancement of ferromagnetic fluctuations in heavily overdoped Bi-2201 cuprates (2017)
  • Author(s): T. Adachi, K. Kurashima, T. Kawamata, T. Noji, I. Watanabe, M. Miyazaki, A. Koda, R. Kadono and Y. Koike
  • Organizer: The 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017)
  • Int'l Joint Research
• [Presentation] Cu-spin correlation and novel electronic state in the electron-doped high-Tc cuprates (2017)
  • Author(s): T. Adachi, T. Sumura, M. A. Baqiya, A. Takahashi, T. Konno, T. Ohgi, K. Kurashima, T. Kawamata, T. Ishimoto, H. Kuwahara, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, S. Awaji and Y. Koike
  • Organizer: 28th International Conference on Low Temperature Physics (LT28)
  • Int'l Joint Research
• [Presentation] Cu-spin correlation and novel electronic state in the electron-doped high-Tc T'-superconductors (2017)
  • Author(s): T. Adachi, T. Sumura, M. A. Baqiya, A. Takahashi, T. Konno, T. Ohgi, K. Kurashima, T. Kawamata, T. Ishimoto, H. Kuwahara, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, S. Awaji and Y. Koike
  • Organizer: International Conference Electron Correlation in Superconductors and Nanostructures (ECSN-2017)
  • Int'l Joint Research / Invited
• [Presentation] Undoped superconductivity and the novel electronic state in the high-Tc T'-cuprates (2017)
  • Author(s): T. Adachi, T. Sumura, M. A. Baqiya, A. Takahashi, T. Konno, T. Ohgi, K. Ohashi, K. Kurashima, T. Kawamata, T. Ishimoto, H. Kuwahara, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, S. Awaji and Y. Koike
  • Organizer: The 2017 European Materials Research Society Fall Meeting
  • Int'l Joint Research / Invited
• [Presentation] T'型銅酸化物RE2CuO4+δ（RE = Pr, Sm）の単結晶における還元処理と電子状態 (2017)
  • Author(s): 川端公貴，桑原英樹，足立匡
  • Organizer: 日本物理学会2017年秋季大会
• [Presentation] PLD法による電子ドープ型銅酸化物T'-La2-xCexCuO4のオーバードープ領域の薄膜作製 (2017)
  • Author(s): パクサンウン，岡部博孝，中村惇平，桑原英樹，門野良典，足立匡
  • Organizer: 日本物理学会2017年秋季大会
• [Presentation] 過剰に還元された電子ドープ型銅酸化物Pr1.3-xLa0.7CexCuO4+δにおけるCuスピン相関と超伝導 (2017)
  • Author(s): 洲村拓哉，石本奨，桑原英樹，倉嶋晃士，小池洋二，渡邊功雄，宮崎正範，幸田章宏，門野良典，足立匡
  • Organizer: 日本物理学会2017年秋季大会
• [Presentation] 過剰に還元された電子ドープ型T'銅酸化物の電子状態 (2017)
  • Author(s): 足立匡, 洲村拓哉, M. A. Baqiya, 高橋晶, 今野巧也, 扇太郎, 倉嶋晃士, 川股隆行, 石本奨, 桑原英樹, 渡邊功雄, 幸田章宏, 宮崎正範, 門野良典, 小池洋二
  • Organizer: 高温超伝導フォーラム第5回会合
• [Presentation] 頂点酸素誘起反強磁性－ミュオン・局所磁性 (2017)
  • Author(s): 足立匡
  • Organizer: CMRC研究会「強相関電子系における局所構造変調が誘起する創発現象
  • Place of Presentation: 高エネルギー加速器研究機構（茨城県，東海村）
  • Invited
• [Presentation] Novel electronic state and superconductivity in the electron-doped high-Tc T'-superconductors (2016)
  • Author(s): T. Adachi
  • Organizer: 3rd International Conference on Functional Materials Science (ICFMS2016)
  • Place of Presentation: Bali （Indonesia）
  • Year and Date: 2016-10-19
  • Int'l Joint Research / Invited
• [Presentation] ミュオンスピン緩和から見た電子ドープ型T'銅酸化物のオーバードープ領域におけるCuスピン相関 (2016)
  • Author(s): 足立匡，M. A. Baqiya，扇太郎，今野巧也，渡邊功雄，小池洋二
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学（石川県，金沢市）
  • Year and Date: 2016-09-16
• [Presentation] T'型銅酸化物高温超伝導体におけるCuスピン相関と新奇な電子状態 (2016)
  • Author(s): 足立匡
  • Organizer: 超低速ミュオンが拓く科学シンポジウム／新学術領域領域会議
  • Place of Presentation: いばらき量子ビームセンター（茨城県，東海村）
  • Year and Date: 2016-08-26
• [Presentation] Muon spin relaxation and transport studies in the electron-doped high-Tc T'-superconductors revealing the novel electronic state (2016)
  • Author(s): T. Adachi, A. Takahashi, T. Konno, T. Ohgi, M. A. Baqiya, K. Kurashima, K. M. Suzuki, T. Takamatsu, T. Kawamata, M. Kato, I. Watanabe, A. Koda, M. Miyazaki, R. Kadono, H. Oguro, S. Awaji, Y. Koike
  • Organizer: International Conference on Superstirpes 2016
  • Place of Presentation: Ischia （Italy）
  • Year and Date: 2016-06-23
  • Int'l Joint Research / Invited
• [Remarks] 上智大学理工学部機能創造理工学科足立研究室ホームページ
  • URL: http://www.ph.sophia.ac.jp/~adachi/
• [Remarks] 上智大学理工学部機能創造理工学科足立研究室ホームページ
  • URL: http://nile.ph.sophia.ac.jp/~adachi/