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Influence of two type of spin structures on the form of the Fermi surface(FS) and a photoemission intensity map is studied for t-t'-U Hubbard model.Mean field calculations are done for the stripe phase and for the spiral spinstructure. It is shown, that unlike a case of electron doping, the hole-dopedmodels are unstable with respect to formation of such structures. The pseudogapanisotropies are different for h- and e- doping. In accordance with ARPES datafor La2SrxCuO4 the stripe phase is characterized by quasi-one-dimensionalsegments of FS at k=(\pi,0) and by suppression of spectral weight in diagonaldirection. It is shown that spiral structures display the polarisationanisotropy: different segments of FS correspond to electros with different spinpolarisations.Comment: 12 pages, 4 figure

Effect of spin structures and nesting on the shape of the fermi surface and pseudogap anisotropy in the t-t′-U Hubbard models