2000/07/28 by A. S. Moskvin, Moskvin, A. S., E. N. Kondrashov +3
Materials Science · Physics and Astronomy · #Copper-based nanomaterials and applications #FOS: Physical sciences #Ga2O3 and related materials #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0007470
16 pages, TeX, 9 eps figures added
openalex publication_date 2000/07/28 · arxiv created 2001/02/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It has been made an extention of the conventional theory based on the assumption of the well isolated Zhang-Rice singlet to be a first electron-removal state in dielectric copper oxide. One assumes the photohole has been localised on either small (pseudo)Jahn-Teller polaron or large non-adiabatic polaron enclosed one or four to five CuO4 centers, respectively, with active one-center valent (1A1g-1,3Eu) manifold. In the framework of the cluster model we have performed a model microscopic calculation of the \bf k-dependence of the matrix element effects and photon polarization effects for the angle-resolved photoemission in dielectric cuprate like Sr2CuO2Cl2. We show that effects like the ''remnant Fermi surface'' detected in ARPES experiment for Ca2CuO2Cl2 may be, in fact, a reflection of the matrix element effects, not a reflection of the original band-structure Fermi surface, or the strong antiferromagnetic correlations. The measured dispersion-like features in the low-energy part of the ARPES spectra may be a manifestation of the complex momentum-dependent spectral line-shape of the large PJT polaron response, not the dispersion of the well-isolated Zhang-Rice singlet in antiferromagnetic matrix.