Electron Green's function in the planar t − J model
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Abstract
The electron Green's functions G(k, ω) within the t − J model and in the regime of intermediate doping is studied analytically using equations of motion for projected fermionic operators and the decoupling of the self energy into the single-particle and spin fluctuations. It is shown that the assumption of marginal spin dynamics at T = 0 leads to an anomalous quasiparticle damping. Numerical results show also a pronounced asymmetry between the hole (ω < 0) and the electron (ω > 0) part of the spectral function, whereby hole-like quasiparticles are generally overdamped.
Keywords
Fermi Surface Spectral Function Hubbard Model Fermi Liquid Spin Dynamic
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