SKM 2023 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 3: Development of Computational Methods: Evaporation, Growth and Oxidation – Density Functional, Tight Binding
MM 3.4: Vortrag
Montag, 27. März 2023, 11:00–11:15, SCH A 251
Liquid-Diffusion-Limited Growth of Vanadium Dioxide Single-Crystals — •Nico Sprinkart, Daniel Kazenwadel, Roman Hartmann, and Peter Baum — Department of Physics, University of Konstanz
Vanadium dioxide (VO2) is a strongly correlated material with an ultrafast first-order phase transition between rutile/insulator and monoclinic/metallic close to room temperature. The unusual and complex properties of this transition make VO2 one of the most heavily investigated materials in modern condensed matter physics. Consequently, high-quality single-crystals are in large demand.
Here we present a method for the growth of mm-sized stoichiometric VO2 crystals by thermal decomposition of liquid V2O5. Time-resolved measurements of the oxygen release reveal that the crystal growth rate is limited by liquid-phase diffusion; the properties of the gaseous environment, which were previously assumed to be decisive, are almost insignificant.
Our results signify the role of gas-liquid diffusion in crystal growth and will simplify future research on VO2 and its subsequent application in ultrafast electronics and thermal energy management.