Magnetic properties of the doped two-dimensional antiferromagnet
arXiv:cond-mat/0209085 · doi:10.1142/S0217984903005457
Abstract
The variety of the normal-state magnetic properties of cuprate high-Tc superconductors is interpreted based on the self-consistent solution of the self-energy equations for the two-dimensional t-J model. The observed variations of the spin correlation length with the hole concentration x, of the spin susceptibility with x and temperature T and the scaling of the static uniform susceptibility are well reproduced by the calculated results. The nonmonotonic temperature dependence of the Cu spin-lattice relaxation rate is connected with two competing tendencies in the low-frequency susceptibility: its temperature decrease due to the increasing spin gap and the growth of the susceptibility in this frequency region with the temperature broadening of the maximum in the susceptibility.
6 pages, 5 figures, Proc. Int. Conf. "Modern Problems of Superconductivity", 9-14 Sept. 2002, Yalta, Ukraine