On stationary topological solitons in a two-dimensional anisotropic Heisenberg model

We study stationary two-dimensional solitons in an easy-axis Heisenberg magnet with the Hamiltonian density wherei=1, 2,a=1, 2, 3, and (x_i) is the angle between unit vector s(x_i) and the easy axis, 0<p<. Stable solitons with a topological chargeQ=1 and localized distributionss^a(x_i) withQ=2 are found. The existence of the bound states of two solitons withQ=1 is shown numerically for 0<p<.