Superdiffusive Spin Transport as a Mechanism of Ultrafast Demagnetization
2010 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 105, no 2, 027203- p.Article in journal (Refereed) Published
We propose a semiclassical model for femtosecond laser-induced demagnetization due to spin-polarized excited electron diffusion in the superdiffusive regime. Our approach treats the finite elapsed time and transport in space between multiple electronic collisions exactly, as well as the presence of several metal films in the sample. Solving the derived transport equation numerically we show that this mechanism accounts for the experimentally observed demagnetization within 200 fs in Ni, without the need to invoke any angular momentum dissipation channel.
Place, publisher, year, edition, pages
2010. Vol. 105, no 2, 027203- p.
IdentifiersURN: urn:nbn:se:uu:diva-135801DOI: 10.1103/PhysRevLett.105.027203ISI: 000279697900001OAI: oai:DiVA.org:uu-135801DiVA: diva2:375978