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Cluster-Based Haldane State in an Edge-Shared Tetrahedral Spin-Cluster Chain: Fedotovite K2Cu3O(SO4)3

M. Fujihala, T. Sugimoto, T. Tohyama, S. Mitsuda, R. A. Mole, D. H. Yu, S. Yano, Y. Inagaki, H. Morodomi, T. Kawae, H. Sagayama, R. Kumai, Y. Murakami, K. Tomiyasu, A. Matsuo, and K. Kindo
Phys. Rev. Lett. 120, 077201 – Published 12 February 2018
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Abstract

Fedotovite K2Cu3O(SO4)3 is a candidate of new quantum spin systems, in which the edge-shared tetrahedral (EST) spin clusters consisting of Cu2+ are connected by weak intercluster couplings forming a one-dimensional array. Comprehensive experimental studies by magnetic susceptibility, magnetization, heat capacity, and inelastic neutron scattering measurements reveal the presence of an effective S=1 Haldane state below T4K. Rigorous theoretical studies provide an insight into the magnetic state of K2Cu3O(SO4)3: an EST cluster makes a triplet in the ground state and a one-dimensional chain of the EST induces a cluster-based Haldane state. We predict that the cluster-based Haldane state emerges whenever the number of tetrahedra in the EST is even.

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  • Received 26 September 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.077201

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

M. Fujihala1,*, T. Sugimoto2,†, T. Tohyama2, S. Mitsuda1, R. A. Mole3, D. H. Yu3, S. Yano4, Y. Inagaki5, H. Morodomi5, T. Kawae5, H. Sagayama6, R. Kumai6, Y. Murakami6, K. Tomiyasu7, A. Matsuo8, and K. Kindo8

  • 1Department of Physics, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
  • 2Department of Applied Physics, Faculty of Science, Tokyo University of Science, Katsushika, Tokyo 125-8585, Japan
  • 3Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2232, Australia
  • 4National Synchrotron Radiation Research Center, Neutron Group, Hsinchu 30077, Taiwan
  • 5Department of Applied Quantum Physics, Faculty of Engineering, Kyushu University, Fukuoka 819-0395, Japan
  • 6Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
  • 7Department of Physics, Tohoku University, Sendai 980-8578, Japan
  • 8International MegaGauss Science Laboratory, Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan

  • *fujihara@nsmsmac4.ph.kagu.tus.ac.jp
  • sugimoto.takanori@rs.tus.ac.jp

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Issue

Vol. 120, Iss. 7 — 16 February 2018

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