Multipolar quantum critical phenomena in Pr and Nd compounds under high pressures up to 20 GPa

• Project/Area Number: 18K03518
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
• Research Institution: Hiroshima University
• Principal Investigator: Umeo Kazunori 広島大学, 自然科学研究支援開発センター, 准教授 (10223596)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 電気四極子秩序 / 超伝導 / 静水圧力 / 異方的圧力 / 反強磁性秩序 / 2チャンネル近藤効果 / 一軸圧力 / 量子臨界現象 / 高圧力 / 比熱 / Pr金属間化合物 / Nd金属間化合物

Outline of Final Research Achievements

Superconductivity in PrIr2Zn20 appears at Tc = 0.05 K in the presence of an antiferroquadrupolar order below TQ = 0.11 K. We have studied pressure dependences of Tc, TQ by using two pressure transmitting media: argon maintaining highly hydrostatic pressure and glycerol which solidifies above 5 GPa producing non-hydrostatic pressure. Upon applying P with argon up to 10.6 GPa, Tc hardly changes while TQ monotonically increases from 0.11 K to 0.23 K. With glycerol, however, TQ and Tc simultaneously fall below 0.04 K at 6.3 GPa. The contrasting results indicate that onsite quadrupolar fluctuations induce superconductivity in this compound.
The downward behavior in the resistivity of NdCo2Zn20 up to 13 GPa can be reproduced by the theoretical formula based on the two channel Kondo effect.

Academic Significance and Societal Importance of the Research Achievements

希土類プラセオジム（Pr）を含む化合物において、Prの電気四極子が空間整列した状態（電気四極子秩序）で超伝導が発現するには、電気四極子のゆらぎが必要不可欠であることを、世界で初めて実験的に立証した。この研究によって，これまでに発現機構が解明されていない特異な超伝導の機構解明につながり，さらに，新しい高温超伝導などの新規材料開発の指針を与える。

Research Products

• [Journal Article] 圧力で熱電変換材料の大振幅原子振動をコントロール/熱電変換の高効率化に道筋 (2021)
  • Author(s): 梅尾和則
  • Journal Title: クリーンエネルギー Volume: 2月号
  • NAID: 40022482444
• [Journal Article] Uniaxial-Pressure-Induced Release of Magnetic Frustration in a Triangular Lattice Antiferromagnet YbCuGe (2020)
  • Author(s): Umeo Kazunori、Watanabe Daichi、Araki Koji、Katoh Kenichi、Takabatake Toshiro
  • Journal Title: Metals Volume: 11 Issue: 1 Pages: 30-30
  • DOI: 10.3390/met11010030
  • Peer Reviewed / Open Access
• [Journal Article] Pressure-induced quenching of planar rattling in Cu10Zn2Sb4S13 studied by specific heat and x-ray diffraction measurements (2020)
  • Author(s): Umeo Kazunori、Suekuni Koichiro、Takabatake Toshiro、Nishibori Eiji
  • Journal Title: Physical Review B Volume: 102 Issue: 10
  • DOI: 10.1103/physrevb.102.100302
  • Peer Reviewed
• [Journal Article] Simultaneous collapse of antiferroquadrupolar order and superconductivity in PrIr2Zn20 by nonhydrostatic pressure (2020)
  • Author(s): Umeo Kazunori、Takikawa Riho、Onimaru Takahiro、Adachi Makoto、Matsumoto Keisuke T.、Takabatake Toshiro
  • Journal Title: Physical Review B Volume: 102 Issue: 9
  • DOI: 10.1103/physrevb.102.094505
  • Peer Reviewed
• [Journal Article] Pressure Effect on the Chiral Helimagnetic Order in YbNi3Al9 (2020)
  • Author(s): Ota Yoshihiko、Umeo Kazunori、Otaki Takumi、Arai Yudai、Onimaru Takahiro、Nakamura Shota、Ohara Shigeo
  • Journal Title: Journal of the Physical Society of Japan Volume: 89 Issue: 4 Pages: 044715-044715
  • DOI: 10.7566/jpsj.89.044715
  • Peer Reviewed
• [Journal Article] Non-Kramers Γ3 Doublet Ground State in a Diluted Pr System Y1-xPrxCo2Zn20 (2020)
  • Author(s): Yu Yamane, Takahiro Onimaru, Yasuyuki Shimura, Kazunori Umeo, and Toshiro Takabatake
  • Journal Title: JPS Conf. Proc. Volume: 29
  • DOI: 10.7566/jpscp.29.015001
  • Peer Reviewed / Open Access
• [Journal Article] Magnetic Properties of a Diluted Nd System Y1-xNdxCo2Zn20 for x = 0.20 with a Γ6 Doublet Ground State (2020)
  • Author(s): Rikako Yamamoto, Takahiro Onimaru, Yu Yamane, Yasuyuki Shimura, Kazunori Umeo, and Toshiro Takabatake
  • Journal Title: JPS Conf. Proc. Volume: 29
  • DOI: 10.7566/jpscp.29.015006
  • Peer Reviewed / Open Access
• [Journal Article] Substitution Effect on the Metamagnetic Crossover in the Super-Heavy Fermion Compound YbCo2Zn20 (2020)
  • Author(s): Yasuyuki Shimura, Takafumi Kitazawa, Suguru Tsuda, Sebastian Bachus, Philipp Gegenwart, Yu Yamane, Kazunori Umeo, Takahiro Onimaru, Toshiro Takabatake, Haruyo T. Hirose, Naoki Kikugawa, Taichi Terashima, and Shinya Uji
  • Journal Title: JPS Conf. Proc. Volume: 30
  • DOI: 10.7566/jpscp.30.011121
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Collapse of Ferroquadrupolar Order and Emergence of Non-Fermi Liquid Behavior in La1-xPrxTi2Al20 (2020)
  • Author(s): Shuntaro Asatani, Kazue Urashima, Takahiro Onimaru, Yu Yamane, Kazunori Umeo, and Toshiro Takabatake
  • Journal Title: JPS Conf. Proc. Volume: 30
  • DOI: 10.7566/jpscp.30.011159
  • Peer Reviewed / Open Access
• [Journal Article] Effects of Magnetic Field on the Nonmagnetic Doublet Ground State in PrMgNi4 (2020)
  • Author(s): Yuka Kusanose, Takahiro Onimaru, Gyeong-Bae Park, Yu Yamane, Kazunori Umeo, and Toshiro Takabatake
  • Journal Title: JPS Conf. Proc. Volume: 30
  • DOI: 10.7566/jpscp.30.011160
  • Peer Reviewed / Open Access
• [Journal Article] Magnetic Properties of Rare-Earth Sulfides RCuS2 (R = Dy, Ho, Er, Tm, and Yb) (2020)
  • Author(s): Yudai Ohmagari, Yu Yamane, Takahiro Onimaru, Kazunori Umeo, Yasuyuki Shimura, and Toshiro Takabatake
  • Journal Title: JPS Conf. Proc. Volume: 30
  • DOI: 10.7566/jpscp.30.011167
  • Peer Reviewed / Open Access
• [Journal Article] Effects of Ga and Cd Substitutions for Zn in PrIr2Zn20 on the Quadrupole-Driven Non-Fermi Liquid Behaviors (2019)
  • Author(s): Yamada Reiji J.、Onimaru Takahiro、Uenishi Kazuto、Yamane Yu、Wakiya Kazuhei、Matsumoto Keisuke T.、Umeo Kazunori、Takabatake Toshiro
  • Journal Title: Journal of the Physical Society of Japan Volume: 88 Issue: 5 Pages: 054704-054704
  • DOI: 10.7566/jpsj.88.054704
  • NAID: 40021885901
  • Peer Reviewed
• [Journal Article] Hindered Quadrupole Order in PrMgNi4 with a Nonmagnetic Doublet Ground State (2019)
  • Author(s): Y. Kusanose, T. Onimaru, G.B. Park, Y. Yamane, K. Umeo, T. Takabatake, N. Kawata, and T. Mizuta
  • Journal Title: J. Phys. Soc. Jpn. Volume: 88 Issue: 8 Pages: 083703-083703
  • DOI: 10.7566/jpsj.88.083703
  • NAID: 210000156671
  • Peer Reviewed
• [Journal Article] Interplay between hybridization gaps and unusual magnetic orders in Kondo semiconductors CeT2Al10 (T = Ru and Os) (2019)
  • Author(s): T. Takabatake, Y. Muro, J. Kawabata, K. Hayashi, T. Takeuchi, K. Umeo, T. Ekino, D. T. Adroja
  • Journal Title: Phil. Mag. Volume: 99 Issue: 23 Pages: 2984-2999
  • DOI: 10.1080/14786435.2019.1646438
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 立方晶PrIr2Zn20の反強四極子秩序と超伝導転移に対する非静水圧効果 (2020)
  • Author(s): 瀧川莉穂，梅尾和則，山根悠, 松本圭介, 高畠敏郎，鬼丸孝博
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 一軸性キラル磁性体YbNi3Al9の圧力下比熱測定 (2020)
  • Author(s): 太田 善彦 , 梅尾 和則，鬼丸 孝博，中村 翔太，大原 繁男
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 反強磁性体NdCo2Zn20の磁気ゆらぎが誘起する一次相転移と磁気構造 (2020)
  • Author(s): 山本理香子, 山根悠, 鬼丸孝博, 梅尾和則, 志村恭通, F. Damay, J.-M. Mignot, D. Le, D. T. Adroja, 高畠敏郎
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 磁性半導体YbCuS2の電子構造と磁場にリエントラントな相転移 (2020)
  • Author(s): 大曲雄大, 山根悠, 鬼丸孝博, 志村恭通, 松本拓真, 前田和大, 佐藤仁, 梅尾和則, 高畠敏郎, 廣瀬陽代, 寺嶋太一, 菊川直樹, 宇治進也
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] ハニカム格子系CePt6Al3の重い電子状態 (2020)
  • Author(s): 大石遼平, 井上幸大, 大曲雄大, 草ノ瀬優香, 山根悠, 梅尾和則, 高畠敏郎, 鬼丸孝博
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 非磁性基底二重項をとる立方晶PrMgNi4における結晶場励起と四極子自由度の消失 (2020)
  • Author(s): 草ノ瀬優香, 鬼丸孝博, 朴景培, 山根悠, 梅尾和則, 高畠敏郎, T. Guidi, D. Le, D. T. Adroja
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] 4f3配位系NdRh2Zn20の反強磁性秩序に対する圧力効果 (2019)
  • Author(s): 加藤 大輔, 梅尾 和則, 山本 理香子, 安達 誠, 鬼丸孝博, 高畠敏郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Simultaneous collapse of antiferroquadrupolar order and superconductivity in PrIr2Zn20 by non-hydrostatic pressure (2019)
  • Author(s): K. Umeo, M. Adachi, K. T Matsumoto, T. Onimaru, T. Takabatake
  • Organizer: The International Conference on Strongly Correlated Electron Systems (SCES2019)
  • Int'l Joint Research
• [Presentation] Simultaneous suppression of antiferroquadrupolar order and superconductivity in PrIr2Zn20 by non-hydrostatic pressure (2019)
  • Author(s): K. Umeo, M Adachi, K. T. Matsumoto, T. Onimaru, and T. Takabatake
  • Organizer: J-Physics 2019 International Conference & KINKEN-WAKATE 2019 Multipole Physics
  • Int'l Joint Research
• [Presentation] Pr希薄系Y(Pr)T2Zn20 (T = Ir, Co)における非フェルミ液体的挙動 (2019)
  • Author(s): 山根 悠, 鬼丸 孝博, 志村 恭通, 梅尾和則, 高畠 敏郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] Nd希薄系Y1-xNdxCo2Zn20における非フェルミ液体的挙動 (2019)
  • Author(s): 山本 理香子, 山根 悠, 鬼丸 孝博, 梅尾 和則, 志村 恭通, 高畠 敏郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 希土類内包カゴ状化合物RNi2Mg20 (R = Pr, Nd) における結晶場効果と相転移 (2019)
  • Author(s): 草ノ瀬 優香, 鬼丸 孝博, 山根 悠, 梅尾和則, 高畠敏郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] YbCuS2の磁場誘起リエントラント相転移 (2019)
  • Author(s): 大曲 雄大, 山根 悠, 鬼丸孝博, 山本理香子, 梅尾和則, 志村恭通, 高畠敏郎
  • Organizer: 日本物理学会2019年秋季大会
• [Presentation] 4f3配位系NdCo2Zn20の反強磁性秩序に対する圧力効果 (2019)
  • Author(s): 安達誠, 梅尾和則, 山本理香子, 高畠敏郎, 鬼丸孝博
  • Organizer: 日本物理学会2019年春季大会
• [Presentation] 立方晶PrIr2Zn20の反強四極子転移と超伝導転移の非静水圧力による同時消失 (2018)
  • Author(s): 梅尾和則, 安達誠, 原真司, 松本圭介, 高畠敏郎, 鬼丸孝博
  • Organizer: 日本物理学会2018年秋季大会
• [Presentation] 反強磁性体NdIr2Zn20の電気抵抗率の圧力効果 (2018)
  • Author(s): 安達誠, 梅尾和則, 山田怜志, 高畠敏郎, 鬼丸孝博
  • Organizer: 日本物理学会2018年秋季大会