Magnetoconductance signatures of chiral domain-wall bound states in magnetic topological insulators

Abstract

Recent magnetoconductance measurements performed on magnetic topological insulator candidates have revealed butterfly-shaped hysteresis. This hysteresis has been attributed to the formation of gapless chiral domain-wall bound states during a magnetic field sweep. We treat this phenomenon theoretically, providing a link between microscopic magnetization dynamics and butterfly hysteresis in magnetoconductance. Further, we illustrate how a spatially resolved conductance measurement can probe the most striking feature of the domain-wall bound states: their chirality. This work establishes a regime where a definitive link between butterfly hysteresis in longitudinal magneto-conductance and domain-wall bound states can be made. This analysis provides an important tool for the identification of magnetic topological insulators.

arXiv commentv2: Final published version; 7 pages, 3 figures

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Cited by in corpus (7)

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• Tunable skyrmion-skyrmion binding on the surface of a topological insulator
• Magnetic skyrmion crystal at a topological insulator surface
• Vortex Lattice Structure and Topological Superconductivity in the Quantum Hall Regime
• Real-space effects of a quench in the Su-Schrieffer-Heeger model and elusive dynamical appearance of the topological edge states
• Long-lived non-equilibrium superconductivity in a non-centrosymmetric Rashba semiconductor
• Charged magnons on the surface of a topological insulator