تقرير
Topological Hall effect of Skyrmions from First Principles
| العنوان: | Topological Hall effect of Skyrmions from First Principles |
|---|---|
| المؤلفون: | Chen, Hsiao-Yi, Nomoto, Takuya, Hirschberger, Max, Arita, Ryotaro |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | We formulate a first-principles approach for calculating the topological Hall effect (THE) in magnets with noncollinear nanoscale spin textures. We employ a modeling method to determine the effective magnetic field induced by the spin texture, thereby circumventing the computational challenges associated with superlattice calculations. Based on these results, we construct a Wannier tight-binding Hamiltonian to characterize the electronic states and calculate the Hall conductivity. Applying this approach to the skyrmion material $\rm Gd_2PdSi_3$ shows good agreement with experimental data. Our analysis in momentum space further reveals that the dominant contribution to the THE arises from the crossing points between the folded bands along high-symmetry lines in the Brillouin zone. This work advances numerical techniques for simulating general magnetic system, examplified by but not restricted to skyrmion lattice, and its result offering insights into the complex interplay between spin textures and electronic transport. Comment: 13 pages, 9 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.05731 |
| رقم الأكسشن: | edsarx.2407.05731 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |