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Low-energy renormalization of the electron dispersion of high-T$_c$ superconductors

R. Zeyher·A. Greco
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Abstract

High-resolution ARPES studies in cuprates have detected low-energy changes in the dispersion and absorption of quasi-particles at low temperatures, in particular, in the superconducting state. Based on a new 1/N expansion of the t-J-Holstein model, which includes collective antiferromagnetic fluctuations already in leading order, we argue that the observed low-energy structures are mainly caused by phonons and not by spin fluctuations, at least, in the optimal and overdoped regime.

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R. Zeyher, A. Greco. 2001-03-14. Low-energy renormalization of the electron dispersion of high-T$_c$ superconductors. https://doi.org/10.1103/physrevb.64.140510

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