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Showing 1–2 of 2 results
Advanced filters: Author: Daseob Yoon Clear advanced filters

  • The research to utilize chemical potential mismatch for materials synthesis has been limited across the oxide interface. Here, the authors show that directional ionic transport from the VO2 layers stabilizes the rutile TiO2 phase at extremely low temperatures, at which epitaxy is difficult, by effectively lowering the activation barrier for crystallization.

    • Yunkyu Park
    • Hyeji Sim
    • Junwoo Son
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-10

  • The scattering of charge carriers with line defects, i.e., threading dislocations, needs to be decreased to further enhance electron mobility of lattice-mismatched epitaxial films and heterostructures for the application of high-performance electronic devices. Here, we report a strategy to post-treat epitaxial La-doped BaSnO3 films by delicately controlling oxygen partial pressure p(O2), which achieved significant increase in room temperature electron mobility to 122 cm2∙V−1∙s−1. This mobility enhancement is attributed to an oxygen vacancy-assisted recovery process that reduces the density of dislocations by accelerating the movement of dislocations in ionic crystals under p(O2)-controlled treatment, despite an increase in the density of charged point defects.

    • Daseob Yoon
    • Sangbae Yu
    • Junwoo Son
    ResearchOpen Access
    NPG Asia Materials
    Volume: 10, P: 363-371