THE TOPOLOGICAL STRUCTURE OF SINGLE VORTEX IN THE FF STATE.

In this paper, we study the coexistence of the vortex and the FF state by using the generalized Ginzburg-Landau (GL) functional with the applied magnetic field, and obtain the numeric solutions. Furthermore, we investigate the topological structure of the vortex and find that the property of vortices relies heavily on the modulation q along z-axis. There is no topological vortex when q < qp, and the value $q=\sqrt{\frac{\beta}{-2\delta}}$ is more favorable for the topological vortex. Moreover the magnetic field at the core of the vortex is obtained for the topological vortex. [ABSTRACT FROM AUTHOR]