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VOLUME 58 (1993) | ISSUE 5 | PAGE 381
Stable topological solitons (vortices) in 2D antiferromagnets in an external field
A topologically localized soliton (vortex) in an external magnetic field has a nonzero momentum at a zero velocity. A vortex with a nonzero velocity is therefore stable with respect to collapse, in contrast with the standard situation.