Individual band with higher Chern numbers in double perovskite {001} monolayers

Abstract

We show a tight-binding model for double perovskite monolayers grown in the {001} crystallographic direction can exhibit higher Chern numbers for the lowest band of the model dispersion in the absence of an applied magnetic field, including $\pm 2$, $\pm 4$, $\pm 6$, and $\pm 8$, for model parameters and terms relevant to Sr${}_2$CrWO${}_6$ (SCWO). We further show it is possible to tune between these different topological phases by applying a weak in-plane magnetic field. These results may be important for experimentally realizing exotic band topologies -- and even quantum anomalous Hall insulators with higher Chern numbers -- based on this physics.

arXiv comment9 pages, 9 figures

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Cited by in corpus (4)

• Floquet topological phase transitions in a kicked Haldane-Chern insulator
• Anomalous ferromagnetism and magneto-optical Kerr effect in semiconducting double perovskite Ba2NiOsO6 and its (111) (Ba2NiOsO6)/(BaTiO3)10 superlattice
• Generating and detecting topological phases with higher Chern number
• Magnetic and Electronic Properties of Spin-Orbit Coupled Dirac Electrons on a $(001)$ Thin Film of Double Perovskite Sr${}_2$FeMoO${}_6$