Topological Phases in Oxide Heterostructures with Light and Heavy Transition Metal Ions

Abstract

Using a combination of density functional theory, tight-binding models, and Hartree-Fock theory, we predict topological phases with and without time-reversal symmetry breaking in oxide heterostructures. We consider both heterostructures containing light transition metal ions, and those containing heavy transition metal ions. We find the (111) growth direction naturally leads to favorable conditions for topological phases in both perovskite structures and pyrochlore structures. For the case of light transition metal elements, Hartree-Fock theory predicts the spin-orbit coupling is effectively enhanced by on-site multiple-orbital interactions and may drive the system through a topological phase transition, while heavy elements with intrinsically large spin-orbit coupling require much weaker, or even vanishing electron interactions to bring about a topological phase.

arXiv comment6 pages, 6 figures. Submitted to conference proceedings

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Cited by in corpus (9)

• Topological Magnon Bands and Unconventional Superconductivity in Pyrochlore Iridate Thin Films
• Perspective: Strongly correlated and topological states in [111] grown transition metal oxide thin films and heterostructures
• Topological Properties and Functionalities in Oxide Thin Films and Interfaces
• Correlation effects in pyrochlore iridate thin films grown along the $[111]$ direction
• Electronic structure of a graphene-like artificial crystal of $NdNi{O}_3$
• Chern insulating phases and thermoelectric properties of EuO/MgO(001) superlattices
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• Interaction-driven spin-orbit effects and Chern insulating phases in corundum-based $4d$ and $5d$ oxide honeycomb lattices
• First Principles Prediction of Topological Phases in Thin Films of Pyrochlore Iridates