Superconductivity and Antiferrodistortive Phase Transition in Sr<sub>1-x</sub>Nd<sub>x</sub>TiO<sub>3</sub> Films

ORAL

Abstract

Despite over 60 years of extensive research, the study of superconductivity, ferroelectricity and antiferrodistortive phase transition in SrTiO3 remains puzzling yet intriguing. Through intrinsic defect management, we achieved for the first time electron density as low as 3 × 1017 cm-3 in Sr1-xNdxTiO3 films with the corresponding mobility exceeding 42000 cm2/vs at 1.8 K. By systematically varying the carrier density over three orders of magnitude, we present an important role of intra- vs. inter-band scattering on the superconducting transition temperature Tc across the Lifshitz transition. Significantly, we show a sizable effect of the antiferrodistortive phase transition on the normal state transport properties around 110 K. Finally, we discuss the role of dopant concentration, strain and dimensionality on the interplay between antiferrodistortive phase transition, incipient ferroelectricity, and normal and superconducting transport behavior in epitaxial Sr1-xNdxTiO3 thin films grown by hybrid molecular beam epitaxy approach.

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Presenters

  • Jin Yue

    • Chemical Engineering and Materials Science, University of Minnesotta
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • Chemical Engineering and Materials Science, University of Minnesota - Twin Cities

Authors

  • Jin Yue

    • Chemical Engineering and Materials Science, University of Minnesotta
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • Chemical Engineering and Materials Science, University of Minnesota - Twin Cities

  • Yilikal Z Ayino

    • School of Physics and Astronomy, University of Minnesota

  • Maria Navarro Gastiasoro

    • University of Minnesota
    • School of Physics and Astronomy, University of Minnesota

  • Eylon Persky

    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel

  • Alex Hanukov

    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel

  • Tristan Truttmann

    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • University of Minnesota
    • Chemical Engineering and Materials Science, University of Minnesota - Twin Cities

  • Beena Kalisky

    • physics, Bar Ilan University
    • Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan, Israel

  • Rafael Fernandes

    • University of Minnesota
    • Physics, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota

  • Vlad Pribiag

    • University of Minnesota
    • School pf Physics and Astronomy, University of Minnesota
    • School of Physics and Astronomy, University of Minnesota

  • Bharat Jalan

    • Chemical Engineering & Materials Science, University of Minnesota
    • University of Minnesota
    • Chemical Engineering and Materials Science, University of Minnesotta
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • Chemical Engineering and Materials Science, University of Minnesota
    • Department of Chemical Engineering and Materials Science, University of Minnesota-Minneapolis
    • Chemical Engineering and Materials Science, University of Minnesota - Twin Cities