Dusabirane, F., Leckron, K., Rethfeld, B., & Schneider, H. C. (2024). Interplay of Electron-Magnon Scattering and Spin-Orbit Induced Electronic Spin-Flip Scattering in a two-band Stoner model. arXiv preprint arXiv:2304.14978v3.
This research paper investigates the influence of electron-magnon scattering processes on ultrafast demagnetization in itinerant ferromagnets, focusing on non-equilibrium effects and the interplay between different scattering mechanisms.
The authors develop a microscopic model incorporating electron-magnon interactions and spin-orbit assisted spin-flip electron-electron scattering processes within a two-band Stoner model. They numerically solve dynamical equations for electron and magnon distribution functions, considering electron-phonon and magnon-phonon interactions using relaxation-time approximations.
The study demonstrates the crucial role of non-equilibrium magnons in ultrafast demagnetization, emphasizing the significance of both electron-magnon and spin-orbit induced electron-electron scattering. The findings suggest that magnon emission is the primary driver of demagnetization, while magnon-phonon interactions are essential for remagnetization.
This research provides a deeper understanding of the microscopic mechanisms underlying ultrafast demagnetization in ferromagnets, paving the way for developing more accurate models and predicting demagnetization behavior in various materials.
The model utilizes a simplified band structure and instantaneous excitation process. Future research could incorporate more realistic band structures, excitation conditions, and a microscopic treatment of magnon-phonon interactions for improved accuracy and predictive capabilities.
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