Evolution of the quasiparticle spectral function in cuprates

Details Evolution of the quasiparticle spectral function in cuprates Evolution of the quasiparticle spectral function in cuprates

1998-05-22

arxiv.org/abs/cond-mat/9805297v1

Physics

Condensed Matter

Superconductivity

5 pages, 2 figures (EPS), RevTeX, submitted to Phys Rev B RC

Scientific paper

10.1103/PhysRevB.58.R8905

We analyzed photoemssion data for several doping levels of the Bi_2Sr_2CaCu_2O_{8+x} compounds, ranging from overdoped to underdoped. We show that the high frequency part of the spectra near (0,\pi) can be described by Fermi liquid theory in the overdoped regime, but exhibits a non-Fermi liquid behavior in the underdoped regime. We further demonstrate that this novel behavior fits reasonably well to a 1/\sqrt{\omega} behavior suggested for systems with strong spin fluctuations.

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