Ultrasonic Study of Complex Quantum Degree of Freedom in Highly Symmetrical Cage Structured Compounds(Fostering Joint International Research)

• Project/Area Number: 15KK0146
• Research Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: Yanagisawa Tatsuya 北海道大学, 理学研究院, 准教授 (10456353)
• Research Collaborator: Maple M. Brian カリフォルニア大学サンディエゴ校, 物理学科, 教授 ; Zherlitsyn Sergei ヘルムホルツ研究所ドレスデン・ローゼンドルフ, ドレスデン強磁場研究所, 強磁場研究施設部部門長 ; Sechovský Vladimír カレル大学, 数物理学科, 教授 ; Amitsuka Hiroshi 北海道大学 ; Green Elizabeth Lauren HZDR ; Nakamura Shintaro 東北大学, 金属材料研究所 ; Awaji Satoru 東北大学, 金属材料研究所
• Project Period (FY): 2016 – 2018
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
• Keywords: 超音波 / 四極子 / 多極子 / カゴ状化合物 / 強磁場 / 近藤効果 / 四極子近藤効果 / 強相間電子系 / 物性実験 / 低温物性 / 磁性 / 強相関電子系

Outline of Final Research Achievements

Cubic cage-structured compound PrNi2Cd20 show no evidence for magnetic order in specific heat ang magnetization and suggest a non-Kramers Γ3-doublet crystalline electric field ground state. In order to investigate the CEF ground state and search for possible exotic phenomena such as quadrupolar order and multi-channel Kondo effect, we have performed ultrasonic measurements on a single crystal of PrNi2Cd20 and its reference materials (SmNi2Cd20, (Y,Pr)Ir2Zn20, RBe13 (R = Lu, Th, U), and UAu2Si2), down to 0.02 K up to 58 T, in collaboration with UC San Diego (USA), Dresden High-Magnetic Field Lab. (Germany), Charles Univ. (Prague), IMR, Tohoku Univ. (Japan) and Hokkaido Univ. (Japan). We found corroborating evidence for quadrupolar Kondo effect, and possible multipolar contributions on the low-temperature magnetic field-induced phase of these compounds.

Academic Significance and Societal Importance of the Research Achievements

PrNi2Cd20の Pr サイトは他の原子が作るカゴの中心に位置し局所的に反転対称を持たないため，近年研究コミュニティー内で注目が集まっている「パリティ混成系」に属し，その量子基底状態を調べることは当該研究分野への貢献が期待できる. また，これまでの海外機関との共同研究の事例は，試料提供ならびに人材の移動は海外との間の単一方向の交流が主であったが，本国際共同研究において，我が国の伝統的な強みである多極子物理の知見を活かしつつ，日本・米国・ドイツ・チェコの複数の研究機関に跨り，多角的・柔軟かつ持続可能な試料育成・提供・物性評価ネットワークの構築・強化を達成したことは有意義である.

Research Products

• [Int'l Joint Research] カリフォルニア大学サンディエゴ校(米国) (2017)
• [Int'l Joint Research] カレル大学(チェコ) (2017)
• [Int'l Joint Research] ドレスデン強磁場研究所(ドイツ) (2017)
• [Journal Article] Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field (2018)
  • Author(s): T. Yanagisawa, S. Mombetsu, H. Hidaka, H. Amitsuka, P. T. Cong, S. Yasin, S. Zherlitsyn, J. Wosnitza, K. Huang, N. Kanchanavatee, M. Janoschek, M. B. Maple, and D. Aoki
  • Journal Title: Physical Review B Volume: 97 Issue: 15 Pages: 155137-155137
  • DOI: 10.1103/physrevb.97.155137
  • NAID: 120006489792
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Superconductivity in single crystalline ThBe13 and LuBe13 (2018)
  • Author(s): Klara Uhlrova, Naoyuki Miura, Vladimir Tkac, Jan Prokleska, Maciej Chrobak, Zbigniew Tarnawski, Hiroyuki Hidaka, Tatsuya Yanagisawa, Vladimir Sechovsky, and Hiroshi Amitsuka
  • Journal Title: Physica B: Condensed Matter Volume: 538 Pages: 516-518
  • DOI: 10.1016/j.physb.2017.10.129
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Low-temperature x-ray crystal structure analysis of the cage-structured compounds MBe13 (M = La, Sm, and U) (2018)
  • Author(s): Hiroyuki Hidaka, Ryoma Nagata, Chihiro Tabata, Yusei Shimizu, Naoyuki Miura, Tatsuya Yanagisawa, and Hiroshi Amitsuka
  • Journal Title: Journal of Physical Society of Japan Volume: 87 Issue: 5 Pages: 0536031-7
  • DOI: 10.1103/physrevmaterials.2.053603
  • NAID: 120006504393
  • Peer Reviewed
• [Journal Article] Uncompensated Antiferromagnetic Ordering of UAu2Si2 Studied by 29Si-NMR (2018)
  • Author(s): Chihiro Tabata, Yoshihiko Ihara, Shogo Shimmra, Naoyuki Miura, Hiroyuki Hidaka, Tatsuya Yanagisawa, and Hiroshi Amitsuka
  • Journal Title: Journal of Physical Society of Japan Volume: 87 Issue: 11 Pages: 114707-114707
  • DOI: 10.7566/jpsj.87.114707
  • NAID: 210000135016
  • Peer Reviewed
• [Journal Article] Magnetoelastic phenomena in antiferromagnetic uranium intermetallics: The UAu2Si2 case (2018)
  • Author(s): M. Valiska, H. Saito, T. Yanagisawa, C. Tabata, H. Amitsuka, K. Uhlirova J. Prokleska, P. Proschek, J. Valenta, M. Misek, D. I. Gorbunov, J. Wosnitza, and V. Sechovsky
  • Journal Title: Physical Review B Volume: 98 Issue: 17
  • DOI: 10.1103/physrevb.98.174439
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Magnetically ordered state and crystalline-electric-field effects in SmBe13 (2017)
  • Author(s): H. Hidaka, S. Yamazaki, Y. Shimizu, N. Miura, C. Tabata, T. Yanagisawa, and H Amitsuka.
  • Journal Title: J. Phys. Soc. Jpn. Volume: 86 Issue: 7 Pages: 0747031-6
  • DOI: 10.7566/jpsj.86.074703
  • NAID: 210000134441
  • Peer Reviewed
• [Journal Article] Sm valence states and magnetic properties in SmBe13 and SmTi2Al20 investigated by Sm synchrotron-radiation-based M?ssbauer spectroscopy (2017)
  • Author(s): Tsutsui Satoshi、Kobayashi Yoshio、Nakamura Jin、Kubo Michael K.、Amagasa Shota、Yamada Yasuhiro、Yoda Yoshitaka、Shimizu Yusei、Hidaka Hiroyuki、Yanagisawa Tatsuya、Amitsuka Hiroshi、Yamada Akira、Higashinaka Ryuji、Matsuda Tatsuma D.、Aoki Yuji
  • Journal Title: Hyperfine Interactions Volume: 238 Issue: 1 Pages: 1001-8
  • DOI: 10.1007/s10751-017-1473-z
  • Peer Reviewed
• [Presentation] 単サイト四極子近藤効果の傍証:(Y,Pr)Ir2Zn20 の弾性応答 (2019)
  • Author(s): 柳澤達也
  • Organizer: 新学術領域研究J-Physics: C01トピカルミーティング 拡張多極子物性研究の現状と展望
• [Presentation] UAu2Si2の強磁場に於ける弾性特性 (2019)
  • Author(s): 柳澤達也
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] Probing the ‘Hidden Order’ Phase in URu2Si2 by Means of Ultrasonic Measurements in Pulsed Magnetic Fields (2018)
  • Author(s): T. Yanagisawa
  • Organizer: International Conference on Magnetism 2018
  • Int'l Joint Research
• [Presentation] Anisotropic Elastic Response in the Hidden Order Phase of URu2Si2 under High Magnetic Fields (2018)
  • Author(s): Tatsuya Yanagisawa
  • Organizer: J-Physics2018 Summer School
  • Int'l Joint Research
• [Presentation] 電流と格子回転・歪みによる複合共役場を用いた拡張多極子検出の試み (2018)
  • Author(s): 柳澤達也
  • Organizer: J-Physic: 多極子伝導系の物理 平成30年度領域全体会議(後半キックオフミーティング)
• [Presentation] UNi4Bのトロイダル磁気秩序における磁場中弾性応答 II (2017)
  • Author(s): 松盛泰明, 門別翔太, 齋藤開, 柳澤達也, 日高宏之, 網塚浩
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学豊中キャンパス（大阪府・豊中市）
  • Year and Date: 2017-03-17
• [Presentation] Observation of Multipoles in the Solid State by Means of Ultrasound (2017)
  • Author(s): Tatsuya Yanagisawa
  • Organizer: Physics and Astronomy Department Colloquium Series (California State University, Los Angeles)
  • Invited
• [Presentation] Observation of Multipoles in the Solid State by Means of Ultrasound (2017)
  • Author(s): Tatsuya Yanagisawa
  • Organizer: Physics Colloquium Series (California State University, Fresno)
  • Invited
• [Presentation] Ultrasonic Study of the Elastic Response of the Magnetic Toroidal Order in UNi4B (2017)
  • Author(s): Tatsuya YANAGISAWA, Hiroaki MATSUMORI, Takeaki SAITO, Hiraku SAITO, Hiroyuki HIDAKA and Hiroshi AMITSUKA
  • Organizer: International Conference on Strongly Correlated Electron Systems (SCES2017)
  • Int'l Joint Research
• [Remarks] Jマテリアル強相関物性研究室
  • URL: http://sonicbangs.sci.hokudai.ac.jp/yanagisawa/
• [Remarks] 北海道大学理学研究院 Jマテリアル物性研究室 柳澤達也の個人ホームページ
  • URL: http://sonicbangs.sci.hokudai.ac.jp/yanagisawa/
• [Remarks] 北海道大学理学研究院 Jマテリアル物性研究室 ホームページ
  • URL: http://phys.sci.hokudai.ac.jp/LABS/kyokutei/vlt/
• [Remarks] Jマテリアル強相関電子物性研究室（超音波チーム）
  • URL: http://sonicbangs.sci.hokudai.ac.jp/yanagisawa/publications