Unified quantitative model for magnetic and electronic spectra of the undoped cuprates

Details Unified quantitative model for magnetic and electronic spectra of the undoped cuprates Unified quantitative model for magnetic and electronic spectra of the undoped cuprates

2011-04-21

arxiv.org/abs/1104.4224v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

Using low-energy projection of the one-band t-t'-t"-Hubbard model we derive an effective spin-Hamiltonian and its spin-wave expansion to order 1/S. We fit the spin-wave dispersion of several parent compounds to the high-temperature superconducting cuprates: La2CuO4, Sr2CuO2Cl2 and Bi2Sr2YCu2O8. Our accurate quantitative determination of the one-band Hubbard model parameters allows prediction and comparison to experimental results of measurable quantities such as staggered moment, double occupancy density, spin-wave velocity and bimagnon excitation spectrum and density of states, which is discussed in relation to K-edge RIXS and Raman experiments.

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