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Neutron scattering evidence of spin-liquid behavior in spinel compound CuGa2O4

ORAL

Abstract

We report neutron scattering measurements on a single crystal of CuGa2O4 sample. DC susceptibility shows no sign of ordering and elastic neutron measurements give no indication of magnetic order down to 0.1K. 3D measurements on low energy magnetic excitations show diffuse continuum intensity distributed about Brillouin zone boundary in momentum space at low temperature. The magnetic excitations extend up to at least 6 meV, and any gap must be smaller than 0.5 meV. With increasing temperature, the low energy magnetic excitation intensity gradually goes away, with a significant intensity reduction by 30 K.

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Presenters

  • Zhijun Xu

    National Institute of Standards and Technology, NIST and University of Maryland, NIST Center for Neutron research, National Institute of Standards and Technology, NIST Center for Neutron Research, University of Maryland, NIST Center for Neutron Research, NIST

Authors

  • Zhijun Xu

    National Institute of Standards and Technology, NIST and University of Maryland, NIST Center for Neutron research, National Institute of Standards and Technology, NIST Center for Neutron Research, University of Maryland, NIST Center for Neutron Research, NIST

  • Aashish Sapkota

    Brookhaven national lab

  • Guangyong Xu

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

  • Yimin Qiu

    NIST

  • Matthew Brandon Stone

    Oak Ridge National Lab, Oak Ridge national lab, Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA, Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge National Laboratory, Oakridge National Laboratory

  • Genda Gu

    Brookhaven National Laboratory, Brookhaven National Laboratories, Brookhaven national lab, Brookhaven National Labs, Condensed Matter Physics and Materials Science Department, Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, CMPMS, Brookhaven National Laboratory, Brookhaven National Lab, COndensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • John Tranquada

    Brookhaven National Laboratory, Brookhaven national lab, Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory