Localized spin excitations in an anisotropic Heisenberg ferromagnet with Dzyaloshinskii-Moriya interactions - art. no. 172302

We investigate the nonlinear pin dynamics of an anisotropic Heisenberg ferr omagnetic spin chain with Dzyaloshinskii-Moriya interactions in the semicla ssical limit. We have identified four completely integrable spin models wit h soliton spin excitations for specific parametric choices and also constru cted perturbed solitons. We also obtain solitary spin excitations for a lin early perturbed integrable model at higher order.