Theory of Magnetic-Texture-Induced Anomalous Hall Effect on the Surface of Topological Insulators

Abstract

The anomalous Hall effect is caused by magnetic textures such as skyrmions. We derive an analytical formula of the Hall conductivity on the surface of a topological insulator up to third order in magnetization, $\mathbf{M}(\mathbf{x})$, based on a perturbative approach. We identify the magnetic textures that contribute to the Hall conductivity up to third order in magnetization and second order in spatial differentiation. We treat magnetization as a perturbation to calculate the Hall conductivity for each magnetic texture based on the linear response theory. Furthermore, we estimate the skyrmion-induced Hall conductivity and confirm that it depends on the shape of skyrmions, such as Bloch-type or Néel-type skyrmions. The results of this study can be applied not only to conventional skyrmion systems but also to more general magnetic structures.

References in corpus (2)

• Semiclassical theories of the anomalous Hall effect
• Real space Berry curvature of itinerant electron systems with spin-orbit interaction

Cited by in corpus (3)

• Coherent backscattering in the topological Hall effect
• Noncoplanar and chiral spin states on the way towards Néel ordering in fullerene Heisenberg models
• Skew scattering by magnetic monopoles and anomalous Hall effect in spin-orbit coupled systems