High room-temperature electron mobility in hybrid MBE-grown La-doped SrSnO3 films

ORAL

Abstract

Strain-engineered, phase-pure, epitaxial, and stoichiometric La-doped SrSnO3 films were grown using hybrid molecular beam epitaxy on LaAlO3 (001) and GdScO3 (110) substrates. High room-temperature electron mobility of 61 cm2V-1s-1 was achieved on GdScO3 at a carrier concentration of 7×1019 cm-3, with still room for improved with proper control over structure and doping. Through systematic study of temperature-dependent electronic and magneto-transport behavior, we will show that substrate-induced dislocations can have a strong influence on the electron phase coherence length resulting in a dimensionality crossover from 2D to 3D weak localization. We will then demonstrate that growth-induced cation non-stoichiometry results in a crossover from weak to strong localization of electronic carriers in La-doped SrSnO3 films on LaAlO3. Finally, we will discuss the correlations between electronic transport mechanisms and structural defects associated with cation non-stoichiometry and dislocations.

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Presenters

  • Abhinav Prakash

    Chemical Engineering and Materials Science, University of Minnesota, Chemical Engineering & Materials Science, University of Minnesota

Authors

  • Tianqi Wang

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

  • Abhinav Prakash

    Chemical Engineering and Materials Science, University of Minnesota, Chemical Engineering & Materials Science, University of Minnesota

  • Laxman Thoutam

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

  • William Nunn

    Chemical Engineering and Materials Science, University of Minnesota, Chemical Engineering & Materials Science, University of Minnesota

  • 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

  • Bharat Jalan

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