Magnetic vortex-like excitations on a sphere

Details Magnetic vortex-like excitations on a sphere Magnetic vortex-like excitations on a sphere

2007-03-05

arxiv.org/abs/cond-mat/0703134v2

Phys. Lett. A 368 (2007) 155-163

Physics

Condensed Matter

Strongly Correlated Electrons

15 pages, 8 .eps figures, typed in tex. Version accepted in Physics Letters A (2007), please see DOI #

Scientific paper

10.1016/j.physleta.2007.04.002

We study magnetic vortex-like solutions lying on the spherical surface. The simplest cylindrically symmetric vortex presents two cores (instead of one, like in open surfaces) with same charge, so repealing each other. However, the net vorticity is computed to vanish in accordance with Gauss theorem. We also address the problem of a flat plane in which a conical, a pseudospherical and a hemispherical segments were incorporated. In this case, if we allow the vortex to move without appreciable deformation in this support, then it is attracted by the conical apex and by the pseudosphere as well, while it is repealed by the hemisphere. This suggests that such surfaces could be viewed as pinning and depinning geometries for those excitations. Spherical harmonics coreless solutions are discussed within some details.

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