Influence of spin structures and nesting on Fermi surface and a pseudogap anisotropy in t-t'-U Hubbard model
Abstract
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 spin structure. It is shown, that unlike a case of electron doping, the hole-doped models are unstable with respect to formation of such structures. The pseudogap anisotropies are different for h- and e- doping. In accordance with ARPES data for La2SrxCuO4 the stripe phase is characterized by quasi-one-dimensional segments of FS at k=(\pi,0) and by suppression of spectral weight in diagonal direction. It is shown that spiral structures display the polarisation anisotropy: different segments of FS correspond to electros with different spin polarisations.
Keywords
Cite
@article{arxiv.cond-mat/0305685,
title = {Influence of spin structures and nesting on Fermi surface and a pseudogap anisotropy in t-t'-U Hubbard model},
author = {A A Ovchinnikov and M Ya Ovchinnikova},
journal= {arXiv preprint arXiv:cond-mat/0305685},
year = {2015}
}
Comments
12 pages, 4 figures