F. Onufrieva et J. Rossatmignod, DUAL ITINERANT-LOCALIZED NATURE OF MAGNETISM IN HIGH-T-C CUPRATES, Journal of magnetism and magnetic materials, 144, 1995, pp. 1271-1272
Spin dynamics in YBCO is analysed on a framework of a new theory (base
d on the t-t'-J model and the diagrammatic technique for Hubbard opera
tors) which treats correctly strong electron correlations within CuO2
layer.