Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-07-16
Phys. Rev. B 76, 184435 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
5 pages, 7 figures
Scientific paper
10.1103/PhysRevB.76.184435
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.
Ghosh Saptarshi
Singh Avinash
Srivastava Pooja
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