CuO chains and carrier statistics in YBa2Cu3O6+x
Gogolin A. O., Ioselevich A. S.
The electronic states in Cu-O chains are analyzed in Emery's model. The separation of the spin and charge degrees of freedom is studied. A new representation of the Hamiltonian of the model is proposed. A flow of charges between chains of various lengths and from chains to planes is discussed. Correlations among the structural, antiferromagnetic, and metal-insulator transitions in YBaCuO are also discussed.