Spin-Liquid-Like State in the Triangular Lattice Antiferromagnet TbInO<sub>3</sub>

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.

*This work at Rutgers University was supported by U.S. Department of Energy Grant No. DE-FG02-07ER46382.

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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.