NBCT is an S = 1 antiferromagnetic nickel chain near the D/J quantum critical point

ORAL

Abstract

An S=1 antiferromagnetic chain, [Ni(HF2)(3-Clpy)4]BF4 (py = pyridine), henceforth NBCT, has been reported to be in the intermediate, in-plane anisotropy limit, which is a region of phase space that has not been tested quantitatively against theoretical predictions (large D and small D have both been investigated thoroughly). The best fit Hamiltonian parameters for NBCT from magnetization and specific heat have the easy-plane anisotropy D = 4.3 K, the intrachain antiferromagnetic interaction J = 4.86 K, and the interchain interaction J’ to be negligible, such that D/J = 0.88 in the vicinity of the D/J≈1 quantum critical point. Here, we present inelastic powder neutron scattering data that can be compared with density matrix renormalization group theory.

*This work was supported by NSF DMR-1703003 and NSF DMR-1708410.

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Presenters

  • Daniel Pajerowski

    • Quantum Condensed Matter Division, Oak Ridge National Lab
    • NSD, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory

Authors

  • Daniel Pajerowski

    • Quantum Condensed Matter Division, Oak Ridge National Lab
    • NSD, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Jamie Manson

    • Department of Chemistry and Biochemistry, Eastern Washington University
    • Chemistry & Biochemistry, Eastern Washington Univ

  • Mark Meisel

    • Dept. of Physics and NHMFL, Univ. of Florida
    • Univ of Florida - Gainesville
    • Department of Physics and NHMFL, University of Florida

  • Andrei Podlesnyak

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Oak Ridge National Laboratory

  • Timothy Prisk

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

  • Jacek Herbrych

    • Department of Physics and Astronomy, Univ of Tennessee, Knoxville
    • University of Tennessee
    • Department of Physics and Astronomy, The University of Tennessee