Strain-induced topological transition in SrRu${}_2$O${}_6$ and CaOs${}_2$O${}_6$

Abstract

The topological property of SrRu${}_2$O${}_6$ and isostructural CaOs${}_2$O${}_6$ under various strain conditions is investigated using density functional theory. Based on an analysis of parity eigenvalues, we anticipate that a three-dimensional strong topological insulating state should be realized when band inversion is induced at the A point in the hexagonal Brillouin zone. For SrRu${}_2$O${}_6$, such a transition requires rather unrealistic tuning, where only the $c$ axis is reduced while other structural parameters are unchanged. However, given the larger spin-orbit coupling and smaller lattice constants in CaOs${}_2$O${}_6$, the desired topological transition does occur under uniform compressive strain. Our study paves a way to realize a topological insulating state in a complex oxide, which has not been experimentally demonstrated so far.

7 pages, 5 figures

References in corpus (18)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Insulators with Inversion Symmetry
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Quantum spin Hall effect in a transition metal oxide Na2IrO3
• Long range magnetic ordering in Na${}_2$IrO${}_3$
• Importance of anisotropic exchange interactions in honeycomb iridates. Minimal model for zigzag antiferromagnetic order in Na${}_2$IrO${}_3$
• Antiferromagnetism at T > 500 K in the Layered Hexagonal Ruthenate SrRu2O6
• Localized itinerant electrons and unique magnetic properties of SrRu2O6
• High antiferromagnetic transition temperature of a honeycomb compound SrRu${}_2$O${}_6$
• Fabrication of (111)-oriented Ca0.5Sr0.5IrO3/SrTiO3 superlattices; a designed playground for honeycomb physics
• Electronic structure and the origin of the high ordering temperature in SrRu2O6
• Sr${}_2$(Ba${}_2$)VO${}_4$ under pressure -- an orbital switch and potential $d^1$ superconductor
• t2g-orbital model on a honeycomb lattice: application to antiferromagnet SrRu2O6

Cited by in corpus (6)

• Pseudo-Landau levels of Bogoliubov quasiparticles in strained nodal superconductors
• Transition-Metal Oxide (111) bilayers
• Topologically Invariant Double Dirac States in Bismuth based Perovskites: Consequence of Ambivalent Charge States and Covalent Bonding
• Strain-induced topological phase transition at (111) SrTiO${}_3$-based heterostructures
• Topological property of a $t_{2g}^5$ system with a honeycomb lattice structure
• Non-van der Waals honeycomb antiferromagnet SrRu${}_2$O${}_6$ down to a few layers