Spin structure and dynamics of Pb<sub>2</sub>VO(PO<sub>4</sub>)<sub>2</sub>

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.

*This work was supported by the Swiss National Science Foundation, Division 2
Access to MACS was provided by the Center for High Resolution Neutron Scattering, a partnership between the National Institute of Standards and Technology and the National Science Foundation under Agreement No. DMR-1508249.

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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