Strain-engineered SrSnO3 films with high room-temperature electron mobility

ORAL

Abstract

Bulk SrSnO3 (SSO) exhibits four crystalline polymorphs as a function of temperature. Through comprehensive thin film growth using novel radical-based MBE approach, synchrotron x-ray scattering, electronic transport, and first-principles calculations, we report on the stabilization of different polymorphs of SSO at room temperature (RT), in thin film form. Compressive strain stabilized the high-symmetry tetragonal phase of SSO at RT, which, in bulk, exists only at temperatures between 1062 K and 1295 K. A mobility enhancement of over 300% in the doped tetragonal phase of SSO films compared with the low-temperature orthorhombic polymorph was achieved. We will discuss these results in the context of the role of strain, doping, and disorder on structure and electronic transport of doped SSO films.

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Presenters

  • Abhinav Prakash

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

Authors

  • Tianqi Wang

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

  • Abhinav Prakash

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

  • Yongqi Dong

    University of Science and Technology of China, X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne National Laboratory

  • Tristan Truttmann

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

  • Ashley Bucsek

    Aerospace Engineering and Mechanics, University of Minnesota - Twin Cities

  • Richard D James

    Aerospace Engineering and Mechanics, University of Minnesota - Twin Cities

  • Dillon D Fong

    Argonne National Laboratory, Materials Science Division, Argonne National Laboratory

  • Jong-Woo Kim

    Advanced Photon Source, Argonne National Laboratory, Argonne National Labs, Advanced Photon Source, Argonne National Labs

  • Philip Ryan

    Advanced Photon Source, Argonne National Laboratory, Argonne National Labs, Advanced Photon Source, Argonne National Labs

  • Hua Zhou

    Advanced Photon Source, Argonne National Laboratory, X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Argonne National Lab, Argonne National Laboratory

  • Turan Birol

    Department of Chemical Engineering and Material science, University of Minnesota, Chemical Engineering and Materials Science, University of Minnesota - Twin Cities, University of Minnesota, Department of Chemical Engineering and Materials Science, University of Minnesota, Department of Chemical Engineering and Materials Science, UNIVERSITY OF MINNESOTA

  • Bharat Jalan

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