Theoretical study on spin-1/2 antiferromagnetic kagome systems with a spin gap

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540395
• 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: Tokyo University of Science
• Principal Investigator: FUKUMOTO Yoshiyuki 東京理科大学, 理工学部, 准教授 (00318213)
• Project Period (FY): 2011 – 2013
• Keywords: 磁性

Research Abstract

A deformed kagome system Rb2Cu3SnF12 and spin balls Mo72V30 and W72V30, which are icosidodecahedrons with quantum spins on their vertices, are studied theoretically. For Rb2Cu3SnF12, origin of each of branches in the low-energy spectrum obtained by high-resolution inelastic neutron scattering experiments is specified, and effects of Dzyaloshinskii-Moriya interactions are clarified. For Mo72V30, it is discussed that the small spin gap can be ascribed to the deformation with the D5h symmetry. For W72V30, it is possible to observe low-energy singlet states within the spin gap by Raman scattering experiments.

Research Products

• [Journal Article] Ghost modes and continuum scattering in the dimerized distorted kagome lattice antiferromagnet Rb2Cu3SnF12 (2014)
  • Author(s): K. Matan, Y. Nambu, Y. Zhao, T. J. Sato, Y. Fukumoto, T. Ono, H. Tanaka, C. Broholm, A. Podlesnyak, and G. Ehlers
  • Journal Title: Phys. Rev. B Volume: 89 Pages: 024414
• [Journal Article] Theoretical study of spherical kagomé clusters in Mo72V30 and W72V30 (2014)
  • Author(s): N. Kunisada and Y. Fukumoto
  • Journal Title: Prog. Theor. Exp. Phys Pages: 041I01
• [Journal Article] Infinitely Multiple Steps in Magnetization of Ferro- and Antiferromagnetic Ising Models with Frustration on a Diamond Hierarchical Lattice
  • Author(s): Y. Hirose, A. Oguchi, and Y. Fukumoto
  • Journal Title: J. Phys. Soc. Jpn Volume: (to be published)
• [Presentation] 転送行列密度行列繰り込み群による一次元量子フラストレート系の計算プログラムの開発 (2013)
  • Author(s): 千吉良成紀, 福元好志
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス
  • Year and Date: 2013-09-28
• [Presentation] 球体カゴメ系Mo72V30, W72V20の磁場中比熱 (2013)
  • Author(s): 国定信隆, 福元好志
  • Organizer: 日本物理学会2013年秋季大会
  • Place of Presentation: 徳島大学常三島キャンパス
  • Year and Date: 2013-09-26
• [Presentation] Excitations under fields of the pinwheel valence bond solid state in the Kagome antiferromagnet Rb2Cu3SnF12 (2013)
  • Author(s): Y. Nambu, K. Matan, Y. Zhao, T. Ono, Y. Fukumoto, A. Podlesnyak, G. Ehlers, J.W. Lynn, T. J. Sato, C. Broholm, an H. Tanaka
  • Organizer: International Conference on Neutron Scattering 2013
  • Place of Presentation: Edinburgh International Conference Centre in Edinburgh
  • Year and Date: 2013-07-11
• [Presentation] 球体カゴメ系Mo72V30のラマン散乱スペクトルの理論計算 (2013)
  • Author(s): 国定信隆, 福元好志
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学東広島キャンパス
  • Year and Date: 2013-03-29
• [Presentation] 籠目格子反強磁性体Rb2Cu3SnF12における一重項・三重項励起の磁場依存性 (2013)
  • Author(s): 南部雄亮, K. Matan, Y. Zhao, 小野俊雄, 福元好志, A. Podlesnyak, G. Ehlers, J.W. Lynn, 佐藤卓, C. Broholm, 田中秀数
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 広島大学東広島キャンパス
  • Year and Date: 2013-03-26
• [Presentation] Ground states and magnetic excitations in a fluoride family of S=1/2 kagome-lattice antiferromagnet (2012)
  • Author(s): T. Ono, T. Amemiya, K. Matan, Y. Nambu, Y. Fukumoto, T. J. Sato, and H. Tanaka
  • Organizer: International Conference on Highly Frustrated Magnetism 2012
  • Place of Presentation: McMaster University in Hamilton
  • Year and Date: 2012-06-07
• [Presentation] Effects of Dzyalonshinsky-Moriya Interaction on Magnetic Susceptibilities of the Deformed-Kagome Antiferromagnet Rb2Cu3SnF12 (2012)
  • Author(s): K. Saso, N. Kunisada and Y. Fukumoto
  • Organizer: International Conference on Highly Frustrated Magnetism 2012
  • Place of Presentation: McMaster University in Hamilton
  • Year and Date: 2012-06-07
• [Presentation] Spin Gap and Susceptibilities of Spherical Cluster Mo72V30 (2012)
  • Author(s): N. Kunisada and Y. Fukumoto
  • Organizer: International Conference on Highly Frustrated Magnetism 2012
  • Place of Presentation: McMaster University in Hamilton
  • Year and Date: 2012-06-05
• [Presentation] 異方的球体カゴメ系Mo72V30の小さなスピンギャップとフェリ磁性相 (2012)
  • Author(s): 国定信隆, 福元好志
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学西宮上ケ原キャンパス
  • Year and Date: 2012-03-25