تقرير
Skyrmion-deriven topological spin and charge Hall effects in diffusive antiferromagnetic thin films
| العنوان: | Skyrmion-deriven topological spin and charge Hall effects in diffusive antiferromagnetic thin films |
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| المؤلفون: | Zarezad, Amir N., Barnaś, Józef, Dyrdał, Anna, Qaiumzadeh, Alireza |
| المصدر: | J. Magn. Magn. Mater. 589, 171599 (2024) |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We investigate topological Hall effects in a metallic antiferromagnetic (AFM) thin film and/or at the interface of an AFM insulator-normal metal bilayer with a single skyrmion in the diffusive regime. To determine the spin and charge Hall currents, we employed a Boltzmann kinetic equation with both spin-dependent and spin-flip scatterings. The interaction between conduction electrons and static skyrmions is included in the Boltzmann equation via the corresponding emergent magnetic field arising from the skyrmion texture. We compute intrinsic and extrinsic contributions to the topological spin Hall effect and spin accumulation, induced by an AFM skyrmion. We show that although the spin Hall current vanishes rapidly outside the skyrmion, the spin accumulation can be finite at the edges far from the skyrmion, provided the spin diffusion length is longer than the skyrmion radius. In addition, We show that in the presence of a spin-dependent relaxation time, the topological charge Hall effect is finite and we determine the corresponding Hall voltage. Our results may help to explore antiferromagnetic skyrmions by electrical means in real materials. Comment: 6 pages, 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.jmmm.2023.171599 |
| URL الوصول: | http://arxiv.org/abs/2309.08763 |
| رقم الأكسشن: | edsarx.2309.08763 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.jmmm.2023.171599 |
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