Multiple phase transitions in the vanadium phosphorous oxide

ORAL

Abstract

The vanadium phosphates system (V-P-O) has shown distinct structural stacking and variable valence states of vanadium, providing rich 3d magnetism in this system. V-P-O single crystal was successfully synthesized and characterized by X-Ray diffraction, resistivity, magnetization, heat capacity and neutron scattering measurements. It is a magnetic semiconductor with a band gap of 0.24 eV. Two phase transitions occur at 130 K and 615 K, revealed by transport, susceptibility, and neutron diffraction measurements, suggesting the existence of strongly correlated electrons. In this talk, we will discuss the nature of the phase transitions as well as the light shed by the first principles calculations.

*Work at UCLA was supported by NSF award DMR-1629457. The neutron work was supported by Office of Basic Energy Sciences, U.S. Department of Energy. Work at Minnesota was supported by NSF award DMR-1629260.

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Presenters

  • Jie Xing

    • Physics and Astronomy, Univ of California - Los Angeles
    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles

Authors

  • Jie Xing

    • Physics and Astronomy, Univ of California - Los Angeles
    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles

  • Huibo Cao

    • Neutron Scattering Division, Oak Ridge National Laboratory
    • Oak Ridge National Laboratory
    • Quantum Condensed Matter Division, Oak Ridge National Laboratory
    • Neutron Sciences Directorate, Oak Ridge National Laboratory
    • Neutron Scattering Division, Oak Ridge National Lab
    • Oak Ridge National Lab
    • Oak Ridge Natl Lab
    • Quantum Condensed Matter Division , Oak Ridge National Laboratory

  • Jared Allred

    • Department of Chemistry, the University of Alabama

  • Turan Birol

    • Chemical Engineering and Materials Science, University of Minnesota
    • Chemical Engineering and Material Science, University of Minnesota
    • CEMS, University of Minnesota
    • Department of chemical engineering and materials science,University of Minnesota
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • Univ of Minnesota - Twin Cities
    • Chemical Engineering and Materials Science, university of minnesota

  • Raj Chaklashiya

    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles

  • Junyi Wu

    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles

  • Ni Ni

    • University of California, Los Angeles
    • Department of Physics and Astronomy and California Nano Systems Institute, Univ of California - Los Angeles
    • University of California
    • Physics, University of California, Los Angeles
    • Department of Physics and Astronomy and California NanoSystems Institute, University of California, Los Angeles