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In this work we investigate temperature dependence of electronic structure ofsystem with strong electronic correlations and strong electron-phononinteraction modeling cuprates in the frameworks of the three-band p-d-Holsteinmodel by a polaronic version of the generalized tight binding (GTB) method.Within this approach the electronic structure is formed by polaronicquasiparticles constructed as excitations between initial and final polaronicmultielectron states. Temperature effect is taken into account by occupationnumbers of local excited polaronic states and variations in the magnitude ofspin-spin correlation functions. Temperature increasing leads to broadening ofthe spectral function peak at the top of the valence band, shift of the peak,the decreasing of the peak intensity.

Temperature effect on the electronic structure of the polaronic excitations within the three-band p-d-Holstein model