Year: 2025
Type: preprint
Abstract: Ferromagnetic topological insulators in the quantum anomalous Hall (QAH) regime host chiral, dissipationless edge states whose propagation direction is determined by the internal magnetization. Under suitable conditions, a strong electrical bias can induce magnetization reversal, and thus flip the propagation direction. In this work, we perform time-resolved measurements to investigate the switching dynamics. Our results reveal characteristics consistent with a disordered magnetic landscape and demonstrate that the reversal process is thermally activated, driven by Joule heating during the current pulse. The understanding of the magnetization dynamics in QAH systems opens pathways for local, controlled manipulation of chiral edge states via thermal effects.
Source: arXiv (Cornell University)
DOI: 10.1103/nlqq-w287
Authors: Rupp, Alina, Rosenbach, Daniel, Röper, Torsten, Hoborka, Dominik, Taskin, Alexey A., Ando, Yoichi, Bocquillon, Erwann
Institution: University of Cologne
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
OpenAlex ID: W6979364369
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