Electronic spectral properties of the two-dimensional infinite-U Hubbard model

Abstract

A strong-coupling series expansion for the Green's function and the extremely-correlated Fermi liquid (ECFL) theory are used to calculate the moments of the electronic spectral functions of the infinite-U Hubbard model. Results from these two complementary methods agree very well at both, low densities, where the ECFL solution is the most accurate, and at high to intermediate temperatures, where the series converge. We find that a modified first moment, which underestimates the contributions from the occupied states and is accessible in the series through the time-dependent Green's function, best describes the quasiparticle peak location in the strongly-correlated regime. This is examined by the ECFL results at low temperatures, where it is shown that the spectral function is largely skewed towards the occupied states.

5 pages, 3 figures

References in corpus (4)

• Low-Energy Electronic Structure of the High-Tc Cuprates La2-xSrxCuO4 Studied by Angle-resolved Photoemission Spectroscopy
• Extremely Correlated Fermi Liquids
• Extremely Correlated Fermi Liquid Description of Normal State ARPES in Cuprates
• Extremely Correlated Fermi Liquids: The Formalism

Cited by in corpus (7)

• Transport and Optical Conductivity in the Hubbard Model: A High-Temperature Expansion Perspective
• Extremely correlated Fermi liquid theory meets Dynamical mean-field theory: Analytical insights into the doping-driven Mott transition
• Theory of extreme correlations using canonical Fermions and path integrals
• Extremely Correlated Fermi Liquids in the limit of infinite dimensions
• Linked-cluster expansion for the Green's function of the infinite-U Hubbard model
• Diagrammatic $\lambda$ series for extremely correlated Fermi liquids
• Functional renormalization group for extremely correlated electrons