Strain mediated suppression of the metal-insulator and anti-ferromagnetic transition in EuNiO3 thin films

ORAL

Abstract

Ultrathin epitaxial films of EuNiO$_3$ were grown on a series of substrates traversing highly compressive (-2.4\%) to highly tensile (2.5\%) lattice mismatch. X-ray absorption spectroscopy measurements revealed a strong multiplet splitting in the tensile samples that progressively weakens with increasing compressive strain. Transport measurements further collaborated these findings, showing a successively (from tensile to compressive) lower resistance and a complete suppression of the metal-insulator transition at -2.4\% lattice mismatch. The derivative of the transport showed a strong downturn around the bulk Neel temperature, which was also suppressed with compressive strain.

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Authors

  • Derek Meyers

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Srimanta Middey

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Mikhail Kareev

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • Benjamin Gray

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701

  • John Freeland

    • Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA

  • Jak Chakhalian

    • Department of Physics, University of Arkansas, Fayetteville, AR 72701