Coupling Lattice Instabilities Across the Interface in Ultrathin Oxide Heterostructures

Oxide heterointerfaces constitute a rich platform for realizing novel functionalities in condensed matter. A key aspect is the strong link between structural and electronic properties, which can be modified by interfacing materials with distinct lattice symmetries. Here, we determine the effect of the cubic-tetragonal distortion of SrTiO3 on the electronic proper- ties of thin films of SrIrO3, a topological crystalline metal hosting a delicate interplay between spin-orbit coupling and electronic correlations. We demonstrate that below the transition temperature at 105 K, SrIrO3 orthorhombic domains couple directly to tetragonal domains in SrTiO3. This forces the in-phase rotational axis to lie in-plane and creates a binary domain structure in the SrIrO3 film. The close proximity to the metal−insulator transition in ultrathin SrIrO3 causes the individual domains to have strongly anisotropic transport properties, driven by a reduction of bandwidth along the in-phase axis. The strong structure−property relationships in perovskites make these compounds particularly suitable for static and dynamic coupling at interfaces, providing a promising route towards realizing novel functionalities in oxide heterostructures.

    Organizational unit
    Triscone Group
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    Dataset
    DOI
    10.26037/yareta:bzisdbrk6vhhjceyl572knp46m
    License
    Creative Commons Attribution 4.0 International
Publication date09/03/2020
Retention date18/11/2030
accessLevelPublicAccess levelPublic
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Contributors
  • C. van Thiel, Thierry
  • Fowlie, Jennifer
  • Autieri, Carmine
  • Manca, Nicola
  • Šiškins, Makars
  • Afanasiev, Dmytro
  • Gariglio, Stefano
  • Caviglia, Andrea
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