Spectral properties of the planar t-J model

Details Spectral properties of the planar t-J model Spectral properties of the planar t-J model

1996-07-19

arxiv.org/abs/cond-mat/9607140v1

Phys. Rev. B 55, 7307 (1997)

Physics

Condensed Matter

4 pages, RevTeX, 4 Postscript figures

Scientific paper

10.1103/PhysRevB.55.R7307

The single-particle spectral functions $A({\bf k},\omega)$ and self-energies $\Sigma({\bf k},\omega)$ are calculated within the $t-J$ model using the finite-temperature Lanczos method for small systems. A remarkable asymmetry between the electron and hole part is found. The hole (photoemission) spectra are overdamped, with ${\rm Im} \Sigma \propto \omega$ in a wide energy range, consistent with the marginal Fermi liquid scenario, and in good agreement with experiments on cuprates. In contrast, the quasiparticles in the electron part of the spectrum show weak damping.

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