General analysis of the ARPES line shape for strongly correlated electron systems

Abstract

In many cases the standard perturbation approach appears to be too simple to describe precisely the angle resolved photoemission spectrum of strongly correlated electron system. In particular, to describe the momentum asymmetry observed in photoemission spectra of high-Tc cuprates a phenomenological approach based on extremely correlated Fermi-liquid model has been recently introduced. In this paper we analyze the general structure of the Green function of quasiparticles in strongly correlated electron systems and stress that it is defined not only by the self-energy of Hubbard quasiparticles but also by a strength operator. We show that the later leads to an additional odd momentum contribution to the spectral function and alone can explain the observed asymmetry. So, the asymmetry of the ARPES spectra can be a measure of the strength of electron correlations in materials.

4 pages

References in corpus (7)

• Low-Energy Electronic Structure of the High-Tc Cuprates La2-xSrxCuO4 Studied by Angle-resolved Photoemission Spectroscopy
• Self-consistent self-energy analysis of photoemission data
• Bare electron dispersion from photoemission experiments
• A new hybrid LDA and Generalized Tight-Binding method for the electronic structure calculations of strongly correlated electron systems
• Extremely Correlated Fermi Liquids
• Hidden Fermi Liquid: The Secret of High Tc Cuprates
• Extremely Correlated Fermi Liquid Description of Normal State ARPES in Cuprates

Cited by in corpus (1)

• Momentum-dependent scaling exponents of nodal self-energies measured in strange metal cuprates and modelled using semi-holography