Hydrodynamic study of edge spin-vortex excitations of fractional quantum   Hall fluid
  We undertake a theoretical study of edge spin-vortex excitations in fractional quantum Hall fluid. This is done in view of quantised Euler hydrodynamics theory. The dispersions of true excitations for fractions within $0\leq \nu \leq 1$ are simulated which exhibit universal similarities and differences in behaviour. The differences arise from different edge smoothness and spin (pseudo-spin) polarisations, in addition to spin-charge competition. In particular, tuning the spin-charge factor causes coherent spin flipping associated with partial and total polarisations of edge spin-vortices. This observation is tipped as an ideal mechanism for realisation of functional spintronic devices. 
M. Rabiu, S.Y. Mensah, I.Y. Seini and S.S Abukari
cond-mat.mes-hall cond-mat.mtrl-sci