Momentum and excitation energy dependence of the "waterfalls" in cuprates

2007/02/16 by A. A. Kordyuk, S. V. Borisenko, D. Inosov +15 · 3 citations
Engineering · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.99.237002

published as Phys. Rev. Lett. 99, 237002 (2007) · Accepted to PRL

arxiv created 2007/10/20 · openalex publication_date 2007/12/06 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Using high-resolution angle-resolved photoemission spectroscopy we have studied the momentum and photon energy dependence of the anomalous high-energy dispersion, termed "waterfalls", between the Fermi level and 1 eV binding energy in several high-Tc superconductors. We observe strong changes of the dispersion between different Brillouin zones and a strong dependence on the photon energy around 75 eV, which we associate with the resonant photoemission at the Cu 3p3d_x²-y² edge. We conclude that the high-energy "waterfall" dispersion results from a strong suppression of the photoemission intensity at the center of the Brillouin zone due to matrix element effects and is, therefore, not an intrinsic feature of the spectral function. This indicates that the new high energy scale in the electronic structure of cuprates derived from the "waterfall"-like dispersion may be incorrect.

Citations

• A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2
• Manifestation of the Magnetic Resonance Mode in the Nodal Quasiparticle Lifetime of the Superconducting Cuprates
• Bare electron dispersion from experiment: Self-consistent self-energy analysis of photoemission data
• Possible observation of “string excitations” of a hole in a quantum antiferromagnet
• Universal High Energy Anomaly in the Angle-Resolved Photoemission Spectra of High Temperature Superconductors: Possible Evidence of Spinon and Holon Branches

Cited by

• Finite-temperature spectral function of a hole in a quantum antiferromagnet and the role of phonons
• Extracting the spectral function of the cuprates by a full two-dimensional analysis: Angle-resolved photoemission spectra ofBi2Sr2CuO6
• High-Energy Magnetic Excitations in the Cuprate SuperconductorBi2Sr2CaCu2O8+δ: Towards a Unified Description of Its Electronic and Magnetic Degrees of Freedom