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NMR Investigation of Ferroquadrupolar Order in TmVO<sub>4</sub>

ORAL

Abstract

TmVO4 undergoes a tetragonal to orthorhombic structural phase transition below 2.2K due to a cooperative Jahn-Teller distortion. The Tm ions experience a crystal-field effect with a non-Kramer’s ground state doublet, and undergo ferroquadrupolar order that breaks the C4 symmetry of the lattice. This material is therefore is a model system to investigate Ising nematic ordering without competing phases. While previous 51V NMR has been hampered by significant line broadening due to demagnetization fields at low temperature, here we present improved results in a single crystal of ellipsoidal shape for which this broadening is absent. These are the first NMR measurements in which an ellipsoidal sample is used that has been carefully cut by a focused ion beam (FIB).

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Presenters

  • Nicholas Curro

    University of California, Davis

Authors

  • Igor Vinograd

    University of California, Davis

  • Zhipan Wang

    University of California, Davis

  • Kent Shirer

    Max Planck Institute for Chemical Physics of Solids

  • Daphne Garcia

    University of California, Davis

  • Pierre Massat

    Stanford University

  • Ian Fisher

    Stanford University, Stanford Univ, Department of Applied Physics and Geballe Laboratory for Advanced Materials, Stanford University, Geballe Laboratory for Advanced Materials & Dept. of Applied Physics, Stanford University, Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Geballe Laboratory for Advanced Materials, Stanford University, Department of Applied Physics, Stanford University

  • Nicholas Curro

    University of California, Davis