Intrinsic damping of spin waves by spin current in conducting two-dimensional systems
Résumé
Angle-resolved magneto-Raman scattering has been performed on spin-polarized two-dimensional electron gas embedded in Cd(1-x)Mn(x)Te quantum wells to explore the intrinsic damping of propagating spin-wave modes with in plane momentum q. The damping rate eta follows a quadratic law eta=eta(0)+eta(2)q(2) due to losses in the spin current driven by the magnetization in qualitative agreement with Phys. Rev. B 78, 020404(R) (2008). As a consequence, the propagation length of a spin wave in a conducting system has an intrinsic maximum of importance for spin-wave-based spintronics.
Domaines
Matière Condensée [cond-mat]Origine | Fichiers produits par l'(les) auteur(s) |
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