Vortex behavior near a spin vacancy in two-dimensional XY magnets

Article

关键词: ANISOTROPIC HEISENBERG-MODEL;    IMPURITY-PINNED SOLITONS;    PHASE-TRANSITIONS;    DYNAMICS;    VORTICES;    SYSTEMS;   

DOI  :  10.1103/PhysRevB.68.132409

来源: SCIE

【 摘 要 】

The dynamical behavior of anisotropic two-dimensional Heisenberg models is still a matter of controversy. In order to contribute to this discussion we use Monte Carlo and spin dynamics simulations as well as analytical calculations to study the behavior of vortices in the presence of nonmagnetic impurities. Our simulations show that vortices are attracted and trapped by the impurities. Using this result we show that if we suppose that vortices are not very much disturbed by the presence of the impurities, then they work as an attractive potential to the vortices explaining the observed behavior in our simulations.

【 授权许可】

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