Dynamics of current-induced switching in the quantum anomalous Hall effect
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915410686771200 |
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| author | Rupp, Alina Rosenbach, Daniel Röper, Torsten Hoborka, Dominik Taskin, Alexey A. Ando, Yoichi Bocquillon, Erwann |
| author_facet | Rupp, Alina Rosenbach, Daniel Röper, Torsten Hoborka, Dominik Taskin, Alexey A. Ando, Yoichi Bocquillon, Erwann |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_19665 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dynamics of current-induced switching in the quantum anomalous Hall effect Rupp, Alina Rosenbach, Daniel Röper, Torsten Hoborka, Dominik Taskin, Alexey A. Ando, Yoichi Bocquillon, Erwann Mesoscale and Nanoscale Physics 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. |
| title | Dynamics of current-induced switching in the quantum anomalous Hall effect |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2507.19665 |