O. Heinonen et al., Ensemble density-functional approach to charge-spin textures in inhomogeneous quantum Hall systems, PHYS REV B, 59(12), 1999, pp. 8073-8083
We extend our ensemble density-functional approach to quantum Hall systems
to include noncollinear spins to study charge-spin textures in inhomogeneou
s quantum Hall systems. We have studied the edge reconstruction in quantum
dots at unit bulk filling factor and at 1/3 bulk filling factor as a functi
on of the stiffness of an external confining potential. For soft enough edg
es, these systems reconstruct to a state in which the electron spins rotate
gently as the edge is approached, with a nontrivial spin-charge texture at
the edge of the system. [S0163-1829(99)11411-5].