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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Petrov, R. H. | Madrid |
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| Ali, M. A. |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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Afanasiev, Dmytro
Uzhhorod National University
in Cooperation with on an Cooperation-Score of 37%
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article
Coupling Lattice Instabilities across the Interface in Ultrathin Oxide Heterostructures
Abstract
<p>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 coupling and electronic correlations. We demonstrate that below the transition temperature at 105 K, SrIrO<sub>3</sub> orthorhombic domains couple directly to tetragonal domains in SrTiO<sub>3</sub>. This forces the in-phase rotational axis to lie in-plane and creates a binary domain structure in the SrIrO<sub>3</sub> film. The close proximity to the metal-insulator transition in ultrathin SrIrO<sub>3</sub> 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.</p>