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Effects of nuclear spins in the transverse-field Ising quantum magnet Ho<sub>3</sub>Mg<sub>2</sub>Sb<sub>3</sub>O<sub>14</sub>

ORAL

Abstract

Transverse Ising model is the simplest quantum model which can be realized in rare earth magnets with two-singlet crystal field ground state. Recent interests have been focused on non-Kramer ion based pyrochlore lattice where random transverse fields are introduced by lattice disorder. As all stable isotopes of all non-Kramers ion possess non-zero nuclear spins, the couplings between electronic and nuclear spins (hyperfine interactions) in these systems are usually nonnegligible, yet are little discussed so far. Here, we show that the tripod kagome magnet Ho3Mg2Sb3O14 offers us a new platform to study this effect because of a homogeneous transverse field brought in by the low symmetry of the lattice. Using neutron backscattering and specific heat measurements, we illustrate that nuclear spins dramatically alter the single-ion and collective behaviors of the system. Comparing to classical spin ice system such as Ho2Sn2O7, our results highlight the crucial role played by hyperfine interactions in frustrated quantum magnets, and motivate further investigations of correlated nuclear spins.

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Presenters

  • Martin Mourigal

    Georgia Inst of Tech, School of Physics, Georgia Institute of Technology, Physics, Georgia Institute of Technology, Georgia Institute of Technology

Authors

  • Martin Mourigal

    Georgia Inst of Tech, School of Physics, Georgia Institute of Technology, Physics, Georgia Institute of Technology, Georgia Institute of Technology

  • Zhiling Dun

    Georgia Inst of Tech, School of Physics, Georgia Institute of Technology, Physics, Georgia Institute of Technology, Georgia Institute of Technology

  • Xiaojian Bai

    Georgia Inst of Tech, School of Physics, Georgia Institute of Technology, Georgia Institute of Technology

  • Joseph Paddison

    Oak Ridge National Laboratory, Oak Ridge National Lab

  • Emily Hollingworth

    University of California, Berkeley

  • Franz Demmel

    Rutherford Appleton Lab, SFTC

  • Haidong Zhou

    University of Tennessee, Department of Physics and Astronomy, University of Tennessee, Knoxville, University of Knoxville, Tennessee, Department of Physics & Astronomy, University of Tennessee, University of Tennesse, Knoxville, Physics and anstronomy, University of Tennessee, Department of Physics, University of Tennessee, Physics, University of Tennessee, Knoxville, University of Tennessee, Knoxville