"Waterfalls" phenomenon in superconducting cuprates

Abstract

We show that the "waterfalls", as reported in recent ARPES studies on HTSC, can neither be described as a part of a self-consistent quasiparticle spectrum nor represent a new physical phenomena, namely the "new energy scale". They stem from the critical suppression of the photoemission intensity along the Brillouin zone (BZ) diagonals. Our arguments, however, do not question the existence of the high-energy scale itself (~ 0.25 eV), which is a simple consequence of the renormalization maximum and has been explained earlier in terms of coupling to a continuum of bosonic excitations. Moreover, when the matrix-elements are taken into account, it becomes clear that the photoemission spectrum consists of two components: one represents the spectrum of one-particle excitations and the other, having a grid-like structure along the bonding directions in the BZ, is of yet unknown origin.

extended version of cond-mat/0702374

References in corpus (7)

• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• High-energy kink in high-temperature superconductors
• Bare electron dispersion from photoemission experiments
• Self-consistent self-energy analysis of photoemission data
• Manifestation of the magnetic resonance mode in the nodal quasiparticle lifetime in superconducting cuprates
• Universal waterfalls-like feature in the spectral function of high temperature superconductors
• Possible observation of "string excitations" of a hole in a quantum antiferromagnet

Cited by in corpus (9)

• Effect of strong correlations on the high energy anomaly in hole- and electron-doped high-Tc superconductors
• Phase diagram and single-particle spectrum of CuO${}_2$ layers within a variational cluster approach to the 3-band Hubbard model
• Excitation energy map of the high-energy dispersion anomalies in cuprates
• Fermiology of Cuprates from First Principles: From Small Pockets to the Luttinger Fermi surface
• Universality of the single-particle spectra of cuprate superconductors
• Doping dependent optical properties of Bi2201
• Evidence for Fermi surface reconstruction in the static stripe phase of La${}_{1.8-x}$Eu${}_{0.2}$Sr${}_x$CuO${}_4$, $x=1/8$
• Finite temperature spectral function of a hole in a quantum antiferromagnet and role of phonons
• Energy-dependent scaling of incoherent spectral weight and the origin of the waterfalls in high-Tc cuprates