Electron Green's Function in the Planar t-J Model

Details Electron Green's Function in the Planar t-J Model Electron Green's Function in the Planar t-J Model

1996-11-29

arxiv.org/abs/cond-mat/9612002v1

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages RevTeX, 4 Postscript figures attached. Submitted to Z. Phys., Festschrift issue dedicated to Prof. W. Gotze on the occ

Scientific paper

10.1007/s002570050389

The electron Green's functions $G({\bf k},\omega)$ 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 result show also a pronounced asymmetry between the hole ($\omega<0$) and the electron ($\omega>0$) part of the spectral function, whereby hole-like quasiparticles are generally overdamped.

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