Details

Autor(en) / Beteiligte

• Carva, K
• Battiato, M
• Oppeneer, P M

Titel

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

Ist Teil von

• Physical review letters, 2011-11, Vol.107 (20), p.207201-207201, Article 207201

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

PROLA

Beschreibungen/Notizen

• 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.