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Coupling Lattice Instabilities Across the Interface in Ultrathin Oxide Heterostructures.


ABSTRACT: 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 properties 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.

SUBMITTER: van Thiel TC 

PROVIDER: S-EPMC7254603 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Coupling Lattice Instabilities Across the Interface in Ultrathin Oxide Heterostructures.

van Thiel Thierry C TC   Fowlie Jennifer J   Autieri Carmine C   Manca Nicola N   Šiškins Makars M   Afanasiev Dmytro D   Gariglio Stefano S   Caviglia Andrea D AD  

ACS materials letters 20200309 4


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 SrTiO<sub>3</sub> on the electronic properties of thin films of SrIrO<sub>3</sub>, a topological crystalline metal hosting a delicate interplay between spin-orbit cou  ...[more]

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