APS Logo

Radical-based MBE growth, chemical doping, and electronic transport in SrSnO<sub>3</sub> films

ORAL

Abstract

In this talk, we present our recent study of radical-based molecular beam epitaxy (MBE) growth, and controlled doping in coherent, epitaxial n-doped SrSnO3/GdScO3 (001) films using La and Nd as dopants. By combining detailed growth, structural characterizations, secondary ion mass spectroscopy (SIMS) and temperature-dependent magnetotransport measurements, we show films with one-to-one correlation between dopant and activated carrier concentration. Carrier density exceeding 1 × 1020 cm−3 was achieved in doped SrSnO3 films, which is in excellent agreement with the dopant-solubility limit predicted by density functional theory calculations. A record-high room-temperature mobility of 70 cm2 V−1s−1 at 1 × 1020 cm−3 was obtained in a 12 nm La-doped SrSnO3 film, making this the thinnest perovskite oxide semiconductor with electron mobility exceeding 25 cm2 V−1s−1 at room temperature. We discuss the structure - dopant - scattering mechanisms - transport property relationships, providing essential knowledge for the design of electronic devices using these materials.

–

Presenters

  • 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

Authors

  • 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

  • Fengdeng Liu

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

  • Abhinav Prakash

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

  • 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

  • Thomas E Mates

    Materials Department, University of California, Santa Barbara

  • 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