2003/05/29 by A. A. Ovchinnikov, A A Ovchinnikov, M. Ya. Ovchinnikova +1 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Angle-resolved photoemission spectroscopy #Anisotropy #Fermi Gamma-ray Space Telescope #Fermi surface #Hubbard model #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Pseudogap #Spin (aerodynamics) #Spin polarization #Spin structure #cond-mat.str-el
paper · pdf · doi:10.1134/1.1705707
published in Journal of Experimental and Theoretical Physics 98(3), 546-555 (Pleiades Publishing) · 12 pages, 4 figures
arxiv created 2003/05/29 · openalex publication_date 2004/03/01 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The effect of two types of spin structures on the shape of the Fermi surface and on the map of photoemission intensities for the t-t′-U Hubbard model is investigated. The stripe phase with a period of 8α and the spiral spin structure are calculated in the mean field approximation. It is shown that, in contrast to electron-type doping, hole-doped models are unstable to the formation of such structures. Pseudogap anisotropy is different for h-and e-doping and is determined by the spin structure. In accordance with ARPES data for La2−x SrxCuO4, the stripe phase is characterized by quasi-one-dimensional FS segments in the vicinity of points M(±π, 0) and by suppression of the spectral density for k x =k y . It is shown that spiral structures exhibit polarization anisotropy: different segments of the FS correspond to electrons with different spin polarizations.