The hierarchy of multiple many-body interaction scales in high-temperature superconductors

Details The hierarchy of multiple many-body interaction scales in high-temperature superconductors The hierarchy of multiple many-body interaction scales in high-temperature superconductors

2006-12-21

arxiv.org/abs/cond-mat/0612541v1

Phys. Rev. B 75, 174506 (2007)

Physics

Condensed Matter

Superconductivity

7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.75.174506

To date, angle-resolved photoemission spectroscopy has been successful in identifying energy scales of the many-body interactions in correlated materials, focused on binding energies of up to a few hundred meV below the Fermi energy. Here, at higher energy scale, we present improved experimental data from four families of high-Tc superconductors over a wide doping range that reveal a hierarchy of many-body interaction scales focused on: the low energy anomaly ("kink") of 0.03-0.09eV, a high energy anomaly of 0.3-0.5eV, and an anomalous enhancement of the width of the LDA-based CuO2 band extending to energies of ~ 2 eV. Besides their universal behavior over the families, we find that all of these three dispersion anomalies also show clear doping dependence over the doping range presented.

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