Abstract
The doping and the temperature dependence of various normal-state properties of high-temperature superconductors are studied by applying the t-t'-J model. The slave-boson method is used to treat the strong correlations. The fermion quasiparticles carry both charge and spin and the volume of the Fermi surface satisfies the Luttinger theorem. The quasiparticle energy spectrum used in the calculation is obtained from a mean-field treatment of the t-t'-J model
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