The lattices with the continious vorticity as a model for FQHE
  It was shown that the including spin of 2d electrons at high magnetic field is possible to remove the divergencies in the cores of the vortex lattice and construct the topologically stable states. These states can be considered as the lattices of skyrmions where the unit cell is mapped on the whole sphere of spin directions.That gives the gapped ground state for electrons and can be used as a model for FQHE. 
S.V.Iordanski
cond-mat.mes-hall