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<p>Recently developed ceramic material Ti<sub>3</sub>O<sub>5</sub> exhibits fascinating application properties, from ultrafast switching between metallic and insulating phases to light-to-heat conversion and storage. While the states conferring such properties are not spatially homogeneous, the origin of phase separation and the link between the phase coexistence and dynamics, key for stability of such states, is still little known. In this work, we use time-resolved X-ray diffraction and numerical simulations to establish rules by which the dynamics of heat-driven transition in laser excited Ti<sub>3</sub>O<sub>5</sub> crystallites occur in space and time. The studies are conducted on submicron Ti<sub>3</sub>O<sub>5</sub> crystallites and span a broad timescale allowing separation of phase change regimes. Our results reveal the influence of nanoscopic morphology on the mechanism of macroscopic transformation triggered by laser excitation.</p>

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Picosecond anisotropic phase separation governing photoinduced phase stability in submicron Ti3O5 crystals

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月29日

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  • Ritwika Mandal,
  • Maciej Lorenc,
  • Marco Cammarata,
  • Matteo Levantino,
  • Serhane Zerdane,
  • Étienne Janod,
  • Laurent Cario,
  • Hiroko Tokoro,
  • Shin-ichi Ohkoshi,
  • Elzbieta Trzop,
  • Marina Servol,
  • Guénolé Huitric,
  • Hervé Cailleau,
  • Vinh Ta Phuoc,
  • Florian Banhart,
  • Cristian Enachescu,
  • Laurentiu Stoleriu,
  • Céline Mariette

摘要

Recently developed ceramic material Ti3O5 exhibits fascinating application properties, from ultrafast switching between metallic and insulating phases to light-to-heat conversion and storage. While the states conferring such properties are not spatially homogeneous, the origin of phase separation and the link between the phase coexistence and dynamics, key for stability of such states, is still little known. In this work, we use time-resolved X-ray diffraction and numerical simulations to establish rules by which the dynamics of heat-driven transition in laser excited Ti3O5 crystallites occur in space and time. The studies are conducted on submicron Ti3O5 crystallites and span a broad timescale allowing separation of phase change regimes. Our results reveal the influence of nanoscopic morphology on the mechanism of macroscopic transformation triggered by laser excitation.