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arXiv · 1110.0371

Ab initio investigation of Elliott-Yafet electron-phonon mechanism in laser-induced ultrafast demagnetization

K. Carva·M. Battiato·P. M. Oppeneer
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Abstract

The spin-flip (SF) Eliashberg function is calculated from first-principles for ferromagnetic Ni to accurately establish the contribution of Elliott-Yafet electron-phonon SF scattering to Ni's femtosecond laser-driven demagnetization. This is used to compute the SF probability and demagnetization rate for laser-created thermalized as well as non-equilibrium electron distributions. Increased SF probabilities are found for thermalized electrons, but the induced demagnetization rate is extremely small. A larger demagnetization rate is obtained for {non-equilibrium} electron distributions, but its contribution is too small to account for femtosecond demagnetization.

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K. Carva, M. Battiato, P. M. Oppeneer. 2011-10-03. Ab initio investigation of Elliott-Yafet electron-phonon mechanism in laser-induced ultrafast demagnetization. https://doi.org/10.1103/physrevlett.107.207201

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