Density of states and dispersion of quasiparticles in the Emery model: Nonlocal path-integral Monte Carlo algorithm
- 1 June 1996
- journal article
- Published by Pleiades Publishing Ltd in JETP Letters
- Vol. 63 (11) , 900-906
- https://doi.org/10.1134/1.567111
Abstract
The spectral density of states for a 108-site Cu36O72 cluster in the two-dimensional three-band Emery model is reconstructed with the aid of a path integral Monte Carlo algorithm. Dispersion relations are obtained for quasiparticles in the upper Hubbard band and in the correlated-states band; this corresponds to electron and hole doping of high-Tc superconductors. The form of the isoenergy surfaces is close to the experimentally observed form and confirms the existence of singularities in the density of states near the Fermi level.Keywords
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