Temperature-dependent phonon dispersions in URu$_{2}$Si$_{2}$

ORAL

Abstract

The acoustic and low-energy optical phonon modes of a single crystal of URu$_{2}$Si$_{2}$ were studied via inelastic neutron scattering. The temperature dependence of the phonon dispersions will be compared with results of prior studies of phonons in this material. Our measurements were also sensitive to the temperature evolution of magnetic excitations in the hidden order phase. We will reflect on implications for the nature of the hidden order parameter.

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Authors

  • Nicholas Butch

    • Lawrence Livermore National Laboratory
    • Center for Nanophysics and Advanced Materials, Dept. of Physics, University of Maryland, College Park, MD 20742
    • University of Maryland

  • Jason Jeffries

    • Lawrence Livermore National Laboratory

  • Michael Manley

    • Lawrence Livermore National Laboratory

  • Jeffrey Lynn

    • NIST Center for Neutron Research

  • Marc Janoschek

    • University of California, San Diego

  • Brian Maple

    • University of California, San Diego