2017/08/31 by Kunal L. Tiwari, W. A. Coish, T. Pereg-Barnea
Mathematics · Physics and Astronomy · #Advanced Condensed Matter Physics #Bound state #Chiral anomaly #Chirality (physics) #Condensed matter physics #Conductance #Domain wall (magnetism) #Gapless playback #Hysteresis #Magnetic domain #Magnetic field #Magnetization #Magnetization dynamics #Mathematics #Physics #Quantum many-body systems #Quantum mechanics #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.96.235120
published as Phys. Rev. B 96, 235120 (2017) · v2: Final published version; 7 pages, 3 figures
arxiv created 2017/12/13 · openalex publication_date 2017/12/13 · arxiv updated 2017/12/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.