Liquid-diffusion-limited growth of vanadium dioxide single crystals

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Vanadium dioxide is a strongly correlated material with an ultrafast first-order phase transition between monoclinic/insulator and rutile/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 report the growth of mm-sized VO2 crystals by thermal decomposition of liquid V2O5 at ∼1000∘C. Time-resolved zirconia sensor 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. Consequently, large and stoichiometric single crystals of VO2 can be obtained at lower temperatures and gas purities than usually applied. These results signify the role of gas-liquid diffusion in crystal growth and will simplify future research on VO2 and related materials for applications in ultrafast electronics and thermal energy management.

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ISO 690SPRINKART, Nico, Daniel L. KAZENWADEL, Roman HARTMANN, Peter BAUM, 2023. Liquid-diffusion-limited growth of vanadium dioxide single crystals. In: Physical Review Research. American Physical Society. 2023, 5(1), 013028. eISSN 2643-1564. Available under: doi: 10.1103/PhysRevResearch.5.013028
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@article{Sprinkart2023Liqui-66046,
  year={2023},
  doi={10.1103/PhysRevResearch.5.013028},
  title={Liquid-diffusion-limited growth of vanadium dioxide single crystals},
  number={1},
  volume={5},
  journal={Physical Review Research},
  author={Sprinkart, Nico and Kazenwadel, Daniel L. and Hartmann, Roman and Baum, Peter},
  note={Article Number: 013028}
}
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