Quantum Monte Carlo study of the itinerant-localized model of strongly   correlated electrons: Spin-spin correlation functions
  We perform quantum Monte Carlo simulations of the itinerant-localized periodic Kondo-Heisenberg model for the underdoped cuprates to calculate the associated spin correlation functions. The strong electron correlations are shown to play a key role in the abrupt destruction of the quasi long-range antiferromagnetic order in the lightly doped regime. 
Ilya Ivantsov, Alvaro Ferraz and Evgenii Kochetov
cond-mat.str-el