Low-temperature metallic phase in V<sub>2</sub>O<sub>3</sub> films due to structural confinement

ORAL

Abstract

We show that high purity V2O3 films grown on certain substrates exhibit a suppressed metal insulator transition (MIT) and in some cases even a reentrant metallic phase at low temperature. This occurs only in films which have the c-axis in the out-of-plane direction. For this lattice orientation the MIT entails a structural expansion which is entirely in the film plane. As the MIT progresses, some expansion into the low temperature monoclinic phase occurs but in-plane confinement prohibits a full expansion of the lattice. Instead, a coexisting metallic phase is stabilized down to the lowest temperatures measured. This low temperature metallic phase exhibits structural and electrical properties which are distinct from the high temperature metallic phase.

*Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. DE-SC0019273.

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Presenters

  • Yoav Kalcheim

    • University of California, San Diego
    • Department of Physics, University of California San Diego

Authors

  • Yoav Kalcheim

    • University of California, San Diego
    • Department of Physics, University of California San Diego

  • Coline Adda

    • Department of Physics, University of California San Diego
    • University of California, San Diego

  • Nareg Ghazikhanian

    • Department of Physics, University of California San Diego

  • Henry Navarro

    • Department of Physics, University of California San Diego

  • Pavel Salev

    • University of California, San Diego
    • Department of Physics, University of California San Diego

  • Javier del Valle

    • University of California, San Diego
    • Center for Advanced Nanoscience, Department of Physics, University of California-San Diego
    • Department of Physics, University of California San Diego
    • UCSD

  • Ivan Schuller

    • University of California, San Diego
    • Department of Physics, University of California San Diego
    • Center for Advanced Nanoscience, Department of Physics, University of California-San Diego