Topological magnetic dipolar interaction and non-local electric magnetization control in topological insulator heterostructures

Abstract

The magnetoelectric effect predicted in topological insulators makes heterostructures that combine magnetic materials and such insulators promising candidates for spintronics applications. Here, we theoretically consider a setup that exhibits two well-separated interfaces between a topological insulator and a ferromagnetic insulator. We show that there is a topological magnetic dipole-dipole interaction stemming from long-range Coulomb interactions. We analytically derive the magnetization dynamics at the two interfaces and discuss how the long-range coupling can be applied to non-locally induce the formation of a magnetic texture at one interface by suitably gating the other interface.

5 pages, 3 figures; reference updated, minor changes to match published version

References in corpus (7)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized topological magnetoelectric effect of the zero-plateau quantum anomalous Hall state
• Proximity Driven Enhanced Magnetic Order at Ferromagnetic Insulator / Magnetic Topological Insulator Interface
• Electrostatic Coupling between Two Surfaces of a Topological Insulator Nanodevice
• Fluctuation-induced magnetization dynamics and criticality at the interface of a topological insulator with a magnetically ordered layer
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Cited by in corpus (5)

• Dirac-Electrons-Mediated Magnetic Proximity Effect in Topological Insulator / Magnetic Insulator Heterostructures
• Magnon-induced superconductivity in a topological insulator coupled to ferro- and antiferromagnetic insulators
• Fluctuation-induced Néel and Bloch skyrmions at topological insulator surfaces
• Finite temperature fluctuation-induced order and responses in magnetic topological insulators
• Topological staggered field-electric effect with bipartite magnets