Hole spectrum and optical conductivity in high-Tc superconductors
V. V. Kabanov, A. Vagov
DOI 10.1103/PhysRevB.47.12134 · Physical Review B
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Abstract
The spectral function of a hole moving in antiferromagnetic background is evaluated in the framework of the Emery model within the spin-wave approximation. It is shown that in the vicinity of quasiparticle peaks the self-energy is not diagonal. The mixture of the singlet and triplet is found to depend on the momentum k. The optical conductivity is estimated. The results of the calculations are in good agreement with experiment and numerical simulations.
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