Discrete modulational instability and bright localized spin wave modes in easy-axis weak ferromagnetic spin chains involving the next-nearest-neighbor coupling |
Temporal evolution of the Brillouin zone boundary mode: (a) γ =0.4, (b) γ =0.5, (c) γ =0.6. The corresponding parameters are as follows: J = 1, S = 10, a = 1, D = 2, A = 10, C0 =0.08, m0 =300, |