Excitation energy map of the high-energy dispersion anomalies in cuprates

Abstract

The anomalous high-energy dispersion of the conductance band in the high-Tc superconductor Pb-Bi2212 has been extensively mapped by angle-resolved photoemission (ARPES) as a function of excitation energy in the range from 34 to 116 eV. Two distinctive types of dispersion behavior are observed around 0.6 eV binding energy, which alternate as a function of photon energy. The continuous transitions observed between the two kinds of behavior near 50, 70, and 90 eV photon energies allow to exclude the possibility that they originate from the interplay between the bonding and antibonding bands. The effects of three-dimensionality can also be excluded as a possible origin of the excitation energy dependence, as the large period of the alterations is inconsistent with the lattice constant in this material. We therefore confirm that the strong photon energy dependence of the high-energy dispersion in cuprates originates mainly from the photoemission matrix element that suppresses the photocurrent in the center of the Brillouin zone.

arXiv comment3 pages, 3 figures. Fig. 3 and reference list updated since v1

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• Electronic structure studies of BaFe2As2 by angle-resolved photoemission spectroscopy
• Intermediate Coupling Model of the Cuprates
• Electronic structure and nesting-driven enhancement of the RKKY interaction at the magnetic ordering propagation vector in Gd2PdSi3 and Tb2PdSi3
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• Evidence for Fermi surface reconstruction in the static stripe phase of La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_4$, $x=1/8$
• Bridging charge-orbital ordering and Fermi surface instabilities in half-doped single-layered manganite La_0.5Sr_1.5MnO_4
• Anomalous High-Energy Electronic Interaction in Iron-Based Superconductor
• Theory of the waterfall phenomenon in cuprate superconductors
• How chemical pressure affects the fundamental properties of rare-earth pnictides: an ARPES view
• Angle-Resolved Photoelectron Spectroscopy Studies of the Many-Body Effects in the Electronic Structure of High-Tc Cuprates
• Energy-dependent scaling of incoherent spectral weight and the origin of the waterfalls in high-Tc cuprates