Abstract
We apply the spin-wave theory with zero staggered magnetization to investigate normal-state properties of the 2D t- J model in the paramagnetic state. In the ranges of hole concentrations 0.02 ≲ x ≲ 0.17 and temperatures T ≲ 100 K where this approach is applicable the hole spectrum is nonmetallic and contains a pseudogap with the properties analogous to those observed in photoemission of cuprate perovskites. Temperature dependences of the correlation length, spin-lattice relaxation time and static susceptibility are typical for the quantum disordered regime and are controlled by overdamped magnons which fill the gap in the spectrum of magnetic excitations.
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