APS Logo

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.

–

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