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Evolution of the quasiparticle spectral function in cuprates

arXiv:cond-mat/9805297 · doi:10.1103/PhysRevB.58.R8905

Abstract

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,π) 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/\sqrtω behavior suggested for systems with strong spin fluctuations.

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

Evolution of the quasiparticle spectral function in cuprates · wovepaper