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Theory of high energy features in angle-resolved photo-emission spectra of hole-doped cuprates

Qiang-Hua Wang·Fei Tan·Yuan Wan
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Abstract

The recent angle-resolved photoemission measurements performed up to binding energies of the order of 1eV reveals a very robust feature: the nodal quasi-particle dispersion breaks up around 0.3-0.4eV and reappears around 0.6-0.8eV. The intensity map in the energy-momentum space shows a waterfall like feature between these two energy scales. We argue and numerically demonstrate that these experimental features follow naturally from the strong correlation effects built in the familiar t-J model, and reflect the connection between the fermi level and the lower Hubbard band. The results were obtained by a mean field theory that effectively projects electrons by quantum interference between two bands of fermions instead of binding slave particles.

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Qiang-Hua Wang, Fei Tan, Yuan Wan. 2006-10-19. Theory of high energy features in angle-resolved photo-emission spectra of hole-doped cuprates. https://doi.org/10.1103/physrevb.76.054505

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