Normal-state pseudogap and electron flat dispersion in copper oxide materials

Details Normal-state pseudogap and electron flat dispersion in copper oxide materials Normal-state pseudogap and electron flat dispersion in copper oxide materials

2000-06-06

arxiv.org/abs/cond-mat/0006084v1

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, Latex, Two figures are included, accepted for publication in Phys. Lett. A

Scientific paper

10.1016/S0375-9601(00)00384-4

The anomalous momentum and doping dependence of the electron spectral function and electron dispersion for copper oxide materials in the underdoped regime are studied within the t-J model. It is shown that the electron spectrum is changed with dopings, and the electron dispersion exhibits a flat band around ($\pi$,0) point in the Brillouin zone, which leads to the normal-state pseudogap formation. The theoretical results are consistent with the experiments and numerical simulations.

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