Dirac semimetal strontium iridate thin films with strong spin-orbit interaction for magnetic heterostructures

2025/11/04 by Ovsyannikov, Gennady A., Dubitskiy, Nikita V., Ulev, Georgi D. +6
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci)

paper · doi:10.48550/arxiv.2511.02998

Abstract

The structural crystal features, electron transport and magnetotransport of the epitaxial strontium iridate (SrIrO₃) and iridate/manganite SrIrO₃/La_0.7Sr_0.3MnO₃ heterostructure have been investigated. The influence of epitaxial strain relaxation caused by the lattice mismatch between SrIrO₃ films and five substrates: SrTiO₃, NdGaO₃, (LaAlO₃)_0.3(Sr₂TaAlO₆)_0.7, LaAlO₃, and Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ on electron and magnetic transport has been observed. A pronounced impact of strong spin-orbit interaction on characteristics of SrIrO₃ films has been revealed by means of X-ray photoelectron spectroscopy, magnetoresistance and Hall-resistance measurements at temperatures T = 2-300 K. These findings highlight the tunability of spin-orbit-driven transport phenomena in strain-controlled SrIrO₃-based epitaxial systems, relevant for future spintronic oxide heterostructures. The contribution of Kondo scattering on temperature dependence of SrIrO₃ films resistance was observed.

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