Finite temperature spectral function of a hole in a quantum antiferromagnet and role of phonons

Abstract

We study thermal broadening of the hole spectral function of the two-dimensional t-J model (and its extensions) within the non-crossing approximation with and without the contribution of optical phonons. We find that phonons at finite temperature broaden the lowest energy quasiparticle peak, however, the string excitations survive even for relatively strong electron-phonon coupling. Experimental angle resolved photo-emission spectroscopy(ARPES) results compare well with our calculations at finite temperature when we use strong electron-phonon coupling without any adhoc broadening. In addition, we have studied the role of vertex corrections and we find that their contribution allows us achieve the same overall agreement with the ARPES experimental results but using smaller values for the electron-phonon coupling.

11 pages, 21 figures

References in corpus (26)

• Angle-resolved photoemission spectroscopy of the cuprate superconductors
• Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors
• A universal high energy anomaly in angle resolved photoemission spectra of high temperature superconductors - possible evidence of spinon and holon branches
• Polaron in t-J model
• High-energy kink in high-temperature superconductors
• Green's function of a dressed particle
• The hierarchy of multiple many-body interaction scales in high-temperature superconductors
• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• Polaronic behavior of undoped high-Tc cuprates
• High-energy scale revival and giant kink in the dispersion of a cuprate superconductor
• Single hole dynamics in the t-J model on a square lattice
• "Waterfalls" phenomenon in superconducting cuprates
• "Waterfalls" in cuprates
• Momentum and excitation energy dependence of the "waterfalls" in cuprates
• High energy kink in the single particle spectra of the two-dimensional Hubbard model
• String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy
• Electron-phonon interaction and antiferromagnetic correlations
• Synergistic Polaron Formation in the Hubbard-Holstein Model at Small Doping
• Temperature and doping dependence of high-energy kink in cuprates
• Temperature dependence of the angle resolved photoemission spectra in the undoped cuprates: self-consistent approach to the t-J-Holstein model
• Spectral Properties of Holstein and Breathing Polarons
• Numerical study of the isotope effect in underdoped high-temperature superconductors: Calculation of the angle-resolved photoemission spectra
• Spectral properties of the planar t-J model
• Electron-phonon coupling in the self-consistent Born approximation of the t-J model
• Possible observation of "string excitations" of a hole in a quantum antiferromagnet
• High energy kink in the dispersion of a hole in an antiferromagnet -- double-occupancy effects on electronic excitations

Cited by in corpus (5)

• Parton theory of ARPES spectra in anti-ferromagnetic Mott insulators
• Low-energy kink in the nodal dispersion of copper-oxide superconductors: Insights from Dynamical Mean Field Theory
• Hole spectral functions in lightly doped quantum antiferromagnets
• Radiative Corrections to Quantum Sticking on Graphene
• Magnon dispersion and Single hole motion in 2D frustrated antiferromagnets with four-sublattice structures