Spin-Liquid-Like State in the Triangular Lattice Antiferromagnet TbInO3

ORAL

Abstract

Unpolarized and polarized inelastic neutron scattering studies in single crystals of the triangular-lattice (TL) antiferromagnets TbInO3 and TbIn0.95Mn0.05O3 are reported. Broad gapless magnetic excitations are located at the TL Brillouin zone boundary. They show a weak enhancement near the M points at the lowest energies, and shift to the K points with increasing energy. At higher energies, a broad dispersing excitation branch, also centered at the zone boundary, is observed after a gap. No signs of magnetic order are found down to the temperatures 100 times smaller than the effective interaction energy given by the excitation bandwidth, indicating a very strong frustration. The fluctuating magnetic moment exceeds one half of the Tb3+ free-ion value and is confined to the TL plane. These observations strongly suggest a triangular-lattice-based spin liquid state in TbInO3.

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Presenters

  • Min Gyu Kim

    Rutgers University, New Brunswick

Authors

  • Min Gyu Kim

    Rutgers University, New Brunswick

  • Barry L. Winn

    Oak Ridge National Laboratory, Neutron Science Directorate, Oak Ridge National Laboratory, Oak Ridge National Lab

  • Songxue Chi

    Oak Ridge National Laboratory, Quantum Condensed Matter Division, Oak Ridge National Laboratory, TN 37831, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Lab

  • Andrei T Savici

    ORNL, Oak Ridge National Lab

  • Jose A Rodriguez

    NIST Center for Neutron Research, NIST, NIST Center for Neutron Research, National Institute of Standards and Technology

  • Yanbin Li

    Rutgers University, New Brunswick

  • Xianghan Xu

    Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Rutgers University, New Brunswick

  • Jae Wook Kim

    Rutgers University, New Brunswick, Physics and Astronomy, Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University

  • Sang-Wook Cheong

    Rutgers University, Department of Physics and Astronomy, Rutgers University, Rutgers University, New Brunswick, Rutgers Center for Emergent Materials and Department of Physics & Astronomy, Rutgers University, Center for Quantum Materials Synthesis and Department of Physics and Astronomy, Rutgers, the State University of New Jersey, Department of Physics, Rutgers University, Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, NJ, Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854, USA, Physics, Rutgers University, Physics and Astronomy, Rutgers University, New Brunswick, Department of Physics and Astronomy, Rutgers University, New Jersey, Rutgers University, Physics and Astronomy, and Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science, RCEM, Department of Physics and Astronomy, Rutgers U., Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Department of Physics and Astronomy, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA, Rutgers Center for Emergent Materials

  • Valery Kiryukhin

    Rutgers University, New Brunswick, RCEM, Department of Physics and Astronomy, Rutgers U.