Spin structure and dynamics of Pb2VO(PO4)2

ORAL

Abstract

Pb2VO(PO4)2 is one of few quantum magnets proposed to realize the frustrated spin-1/2 square lattice with ferromagnetic nearest-neighbor exchange. We have determined the magnetic structure and excitation spectrum of Pb2VO(PO4)2 by means of single crystal neutron diffraction and neutron spectroscopy going beyond previous limited powder sample studies. The spin dynamics show qualitative differences – which were independently confirmed by ESR – from what is expected for an ideal square lattice. These are attributed to having as many as three nearest neighbor and two next-nearest neighbor. We discuss the implications for closely related materials proposed to realize a frustrated square lattice.

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Presenters

  • Simon Bettler

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich

Authors

  • Simon Bettler

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich

  • Florian Landolt

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich

  • Ömer M. Aksoy

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich

  • Zewu Yan

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich, Department of Physics, ETH Zurich

  • Eric Ressouche

    INAC, CEA Grenoble, Univ. Grenoble Alpes, CEA, INAC-MEM, F-38000 Grenoble

  • Sergei Zvyagin

    Dresden High Magnet Field Lab HLD, Helmholtz Zentrum Dresden Rossendorf, Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf (HZDR)

  • Alexey Ponomaryov

    Dresden High Magnet Field Lab HLD, Helmholtz Zentrum Dresden Rossendorf

  • Ketty Beauvois

    Univ. Grenoble Alpes, CEA, INAC-MEM, F-38000 Grenoble

  • Yiming Qiu

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

  • Stephane Raymond

    Univ. Grenoble Alpes, CEA, INAC-MEM, F-38000 Grenoble

  • Severian Gvasaliya

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich

  • Andrey Zheludev

    Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich, Department of Physics, ETH Zurich, ETH Zurich