Ab Initio Investigation of the Elliott-Yafet Electron-Phonon Mechanism in Laser-Induced Ultrafast Demagnetization
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 107, no 20, 207201- p.Article in journal (Refereed) Published
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 nonequilibrium 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 nonequilibrium electron distributions, but its contribution is too small to account for femtosecond demagnetization.
Place, publisher, year, edition, pages
2011. Vol. 107, no 20, 207201- p.
IdentifiersURN: urn:nbn:se:uu:diva-163668DOI: 10.1103/PhysRevLett.107.207201ISI: 000297129200021OAI: oai:DiVA.org:uu-163668DiVA: diva2:464929