Abstract

The theoretical investigation of spectral functions within the single-band t-J model, as relevant for superconducting cuprates, is presented. For spectral functions the method of equations of motion is used, where for the self energy the decoupling of spin and single-particle fluctuations is performed. Longer-range spin fluctuations induce a pseudogap showing up at low doping in the effective truncation of the Fermi surface and in reduced electron and quasiparticle density of states at the Fermi level.Key wordsCupratesSuperconductivityt-J ModelStrong CorrelationsPseudogapSpectral FunctionsFermi SurfaceARPESSpin Fluctuations

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