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Evolution of the quasiparticle spectral function in cuprates

S. Misra·R. Gatt·T. Schmauder·Andrey V. Chubukov·M. Onellion·M. Zacchigna·I. Vobornik·F. Zwick·M. Grioni·G. Margaritondo·C. Quitmann·C. Kendziora
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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.

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S. Misra, R. Gatt, T. Schmauder, Andrey V. Chubukov, M. Onellion, M. Zacchigna, I. Vobornik, F. Zwick, M. Grioni, G. Margaritondo, C. Quitmann, C. Kendziora. 1998-05-22. Evolution of the quasiparticle spectral function in cuprates. https://doi.org/10.1103/physrevb.58.r8905

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