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

Abstract

The electron Green's functions $G(\mathbf{k},\omega )$ 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.

7 pages RevTeX, 4 Postscript figures attached. Submitted to Z. Phys., Festschrift issue dedicated to Prof. W. Gotze on the occasion of his 60th birthday

References in corpus (7)

• Correlated Electrons in High Temperature Superconductors
• Quasiparticle Dispersion of the 2D Hubbard Model: From an Insulator to a Metal
• A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4
• Theory for the excitation spectrum of High-T$_c superconductors : quasiparticle dispersion and shadows of the Fermi surface
• Theory of the density fluctuation spectrum of strongly correlated electrons
• Anomalous Spin Dynamics in Doped Quantum Antiferromagnets
• Charge Dynamics in the Planar t-J Model

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• From local to nonlocal Fermi liquid in doped antiferromagnets
• Cuprates, Manganites, and Cobaltites: Multielectron Approach to the Band Structure
• Violation of Luttinger's theorem in strongly correlated electronic systems within a 1/N expansion
• Electronic spectrum and superconductivity in the extended t-J-V model
• Pseudogap and the Fermi surface in the t-J model