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<p>Ordered corundum oxides introduce new prospects in the field of functional oxides thin films, complementing the more widely studied class of ABO<sub>3</sub> perovskites. In this work, we take advantage of the layer-by-layer growth regime to fabricate epitaxial CrVO<sub>3</sub> superlattice thin films with atomic-scale accuracy on the periodic arrangement of chromium and vanadium layers. By means of X-ray diffraction, scanning transmission electron microscopy and Raman spectroscopy, we confirm the thickness control in the sub-unit cell scale, alternating 3, 2 or 1 single atomic layers of Cr<sub>2</sub>O<sub>3</sub> and V<sub>2</sub>O<sub>3</sub>. We stabilize the ilmenite phase of CrVO<sub>3</sub> (space group <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({{{\rm{R}}}}\bar{3}\)</EquationSource> <EquationSource Format="MATHML"><math> <mi mathvariant="normal">R</mi> <mover accent="true"> <mrow> <mn>3</mn> </mrow> <mo>¯</mo> </mover> </math></EquationSource> </InlineEquation>) and compare the functional properties of the thin film with those calculated by density functional theory. This approach to the growth of ordered corundum oxides opens the path towards the stabilization of complex oxides with tailored properties by varying the composition and the superlattice period, ultimately broadening the family of functional rhombohedral oxides.</p>

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Sub-unit cell engineering of CrVO3 superlattice thin films

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月19日

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  • Claudio Bellani,
  • Simon Mellaerts,
  • Wei-Fan Hsu,
  • Koen Schouteden,
  • Alberto Binetti,
  • Arno Annys,
  • Zezhong Zhang,
  • Nicolas Gauquelin,
  • Johan Verbeeck,
  • Jesús López-Sánchez,
  • Adolfo del Campo,
  • Soon-Gil Jung,
  • Tuson Park,
  • Michel Houssa,
  • Jean-Pierre Locquet,
  • Jin Won Seo

摘要

Ordered corundum oxides introduce new prospects in the field of functional oxides thin films, complementing the more widely studied class of ABO3 perovskites. In this work, we take advantage of the layer-by-layer growth regime to fabricate epitaxial CrVO3 superlattice thin films with atomic-scale accuracy on the periodic arrangement of chromium and vanadium layers. By means of X-ray diffraction, scanning transmission electron microscopy and Raman spectroscopy, we confirm the thickness control in the sub-unit cell scale, alternating 3, 2 or 1 single atomic layers of Cr2O3 and V2O3. We stabilize the ilmenite phase of CrVO3 (space group \({{{\rm{R}}}}\bar{3}\) R 3 ¯ ) and compare the functional properties of the thin film with those calculated by density functional theory. This approach to the growth of ordered corundum oxides opens the path towards the stabilization of complex oxides with tailored properties by varying the composition and the superlattice period, ultimately broadening the family of functional rhombohedral oxides.