High energy kink in the dispersion of a hole in an antiferromagnet -- double-occupancy effects on electronic excitations

Abstract

Evolution of the hole spectral function along the Gamma-(pi,pi) cut is studied in the antiferromagnetic state of the Hubbard model. The kink in the calculated hole dispersion, the sharp spectral-weight transfer between the branches, and the drastically suppressed coherent spectral weight near k=(0,0), as observed recently in the high-resolution ARPES studies of cuprate antiferromagnets, are shown to be strongly enhanced by finite-U double-occupancy effects. Together with the anomalous spin-wave dispersion observed earlier in high-resolution neutron-scattering studies, the present study provides further evidence of a unified description of magnetic and electronic excitations in cuprate antiferromagnets in terms of the Hubbard model.

5 pages, 7 figures

References in corpus (4)

• Anomalous high energy dispersion in photoemission spectra from insulating cuprates
• High-energy scale revival and giant kink in the dispersion of a cuprate superconductor
• String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy
• Possible observation of "string excitations" of a hole in a quantum antiferromagnet

Cited by in corpus (5)

• High Energy Dispersions in Bi2Sr2CaCu2O8 High Temperature Superconductor from Laser-Based Angle-Resolved Photoemission
• Intermediate Coupling Model of the Cuprates
• Excitation energy map of the high-energy dispersion anomalies in cuprates
• Finite temperature spectral function of a hole in a quantum antiferromagnet and role of phonons
• Magnon dispersion and Single hole motion in 2D frustrated antiferromagnets with four-sublattice structures