Study of the quantum spin liquid state of S = 1/2 kagome lattice antiferromagnet

• Project/Area Number: 15K17686
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Hokkaido University
• Principal Investigator: Yoshida Hiroyuki 北海道大学, 理学研究院, 助教 (30566758)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 幾何学的フラストレーション / スピン液体 / カゴメ格子反強磁性体 / Ca-Kapellasite / フラストレーション

Outline of Final Research Achievements

We developed the spin-1/2 Kagome lattice antiferromagnet CaCu3(OH)6Cl2・0.6H2O (Ca-Kapellasite) which had the perfect Kagome lattice without an anti-site disorder. Theoretical studies have predicted the realization of the quantum spin liquid state in which the spin fluctuation survives even at T = 0. By measuring various physical properties of the single crystal of the compound, we found that the unconventional magnetic state was realized and the anomalous magnetic excitation underlay on the ground state of CaCu3(OH)6Cl2・0.6H2O.

Research Products

• [Int'l Joint Research] Oak Ridge National Laboratory(米国)
• [Int'l Joint Research] Rutherford Appleton Laboratory(英国)
• [Int'l Joint Research] ANSTO(Australia)
• [Journal Article] Unusual Magnetic State with Dual Magnetic Excitations in the Single Crystal of S = 1/2 Kagome Lattice Antiferromagnet CaCu3(OH)6Cl2・0.6H2O (2017)
  • Author(s): H. Yoshida, N. Noguchi, Y. Matsushita, Y. Ishii, Y. Ihara, M. Oda, H. Okabe, S. Yamashita, Y. Nakazawa, A. Takata, T. Kida, Y. Narumi, and M. Hagiwara
  • Journal Title: Journal of the Physical Society of Japan Volume: 86 Issue: 3 Pages: 033704-033704
  • DOI: 10.7566/jpsj.86.033704
  • NAID: 210000134285
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] S = 1/2カゴメ格子反強磁性体CaCu3(OH)6Cl2・0.6H2Oの35Cl-NMRによる研究 (2017)
  • Author(s): 吉田紘行, 井原慶彦, 野口直彌, 石井裕人, 高田篤, 木田孝則, 鳴海康雄, 萩原政幸, 河本充司, 佐々木孝彦, 小田研
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学(大阪府・豊中市)
  • Year and Date: 2017-03-17
• [Presentation] 量子スピン液体CaCu3(OD)6Cl20.6D2Oにおける磁気励起 (2017)
  • Author(s): 飯田一樹, 吉田紘行, David J. Voneshen, 野口直彌, 石井裕人, 小田研, 中島健次
  • Organizer: 日本物理学会第72回年次大会
  • Place of Presentation: 大阪大学(大阪府・豊中市)
  • Year and Date: 2017-03-17
• [Presentation] S = 1/2カゴメ格子反強磁性体CaCu3(OH)6Cl2・0.6H2O単結晶の磁性 (2016)
  • Author(s): 吉田紘行, 野口直彌, 石井裕人, 片岡萌子, 小田研, 岡部博孝, 飯田一樹, 山下智史, 中澤康浩, 高田篤, 木田孝則, 鳴海康雄, 萩原政幸
  • 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: 2016-09-13
• [Presentation] Magnetic properties of S = 1/2 kagome lattice antiferromagnet CaCu3(OH)6Cl2・0.6H2O (2016)
  • Author(s): H. Yoshida, N. Noguchi, Y. Ishii, M. Oda, H. Okabe, S. Yamashita, Y. Nakazawa, A. Takata, T, Kida, Y. Narumi, M. Hagiwara
  • Organizer: International conference on Highly Frustrated Magnetism 2016
  • Place of Presentation: Taipei(Taiwan)
  • Year and Date: 2016-09-07
  • Int'l Joint Research
• [Presentation] Frustrated magnetism of kagome lattice antiferromagnet (2015)
  • Author(s): Hiroyuki Yoshida
  • Organizer: International symposium-Challenges and progress in strongly correlated functional materials- MRS-Japan
  • Place of Presentation: Industry&Trade center(Kanagawa prefecture, Yokohama city)
  • Year and Date: 2015-12-08
  • Int'l Joint Research / Invited
• [Presentation] 新奇スピン1/2カゴメ格子反強磁性体CaCu3(OH)6Cl2の磁性 (2015)
  • Author(s): 野口直彌、石井裕人、片岡萌子、吉田紘行、小田研
  • Organizer: 日本物理学会2015年秋季大会
  • Place of Presentation: 関西大学千里山キャンパス(大阪府・吹田市)
  • Year and Date: 2015-09-16
• [Remarks]
  • URL: https://phys.sci.hokudai.ac.jp/~yoshida/
• [Remarks]
  • URL: https://phys.sci.hokudai.ac.jp/~yoshida/