Time-reversal-breaking topological phases in antiferromagnetic Sr${}_2$FeOsO${}_6$ films

Abstract

In this work, we studied time-reversal-breaking topological phases as a result of the interplay between antiferromagnetism and inverted band structures in thin films of antiferromagnetic double perovskite transition-metal Sr${}_2$FeOsO${}_6$. By combining the first-principles calculations and analytical models, we demonstrate that the quantum anomalous Hall phase and chiral topological superconducting phase can be realized in this system. We find that to achieve time-reversal-breaking topological phases in antiferromagnetic materials, it is essential to break the combined symmetry of time reversal and inversion, which generally exists in antiferromagnetic structures. As a result, we can utilize an external electric gate voltage to induce the phase transition between topological phases and trivial phases, thus providing an electrically controllable topological platform for the future transport experiments.

5 pages, 4 figures

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Cited by in corpus (7)

• Prediction of High Temperature Quantum Anomalous Hall Effect in Two Dimensional Transition-Metal Oxides
• Route Towards Dirac and Weyl Antiferromagnetic Spintronics
• Antiferromagnetic Dirac Semimetals in Two Dimensions
• Berry Curvature Engineering by Gating Two-Dimensional Antiferromagnets
• Anomalous ferromagnetism and magneto-optical Kerr effect in semiconducting double perovskite Ba2NiOsO6 and its (111) (Ba2NiOsO6)/(BaTiO3)10 superlattice
• Topological antiferromagnetic spintronics: Part of a collection of reviews on antiferromagnetic spintronics
• From Frustrated to Unfrustrated: Coupling two triangular-lattice itinerant Quantum Magnets