Chiral spin states in polarized kagome spin systems with spin-orbit   coupling
  We study quantum spin systems with a proper combination of geometric frustration, spin-orbit coupling and ferromagnetism. We argue that such a system is likely to be in a chiral spin state, a fractional quantum Hall (FQH) state for bosonic spin degrees of freedom. The energy scale of the bosonic FQH state is of the same order as the spin-orbit coupling and ferromagnetism --- overall much higher than the energy scale of FQH states in semiconductors. 
Jia-Wei Mei, Evelyn Tang and Xiao-Gang Wen
cond-mat.str-el