Spin Diffusion in 2D XY Ferromagnet with Dipolar Interaction
Condensed Matter
2009-10-28 v1
Abstract
In the ordered phase of 2D XY ferromagnet the dipolar interaction between spins induces a strong, relevant interaction between spin-waves. We study quasi-excitations of the interacting spin-wave 'liquid' in the long wavelength limit. We employ the Janssen-De-Dominicis method for classical Langevin equation to find the transformation of the spin-wave excitation into a new soft-mode excitation in the intermediate range of wavelengths; and into an anomalous anisotropic diffusion mode excitation at long wavelengths. The dissipation of a spin-wave at short wavelengths is found to be highly anisotropic.
Keywords
Cite
@article{arxiv.cond-mat/9603160,
title = {Spin Diffusion in 2D XY Ferromagnet with Dipolar Interaction},
author = {A. Kashuba and Ar. Abanov and V. L. Pokrovsky},
journal= {arXiv preprint arXiv:cond-mat/9603160},
year = {2009}
}
Comments
10 pages LaTex paper and one PostScript figure