Extracting the spectral function of the cuprates by a full two-dimensional analysis: Angle-resolved photoemission spectra of Bi2Sr2CuO6
arXiv:0803.0580 · doi:10.1103/PhysRevB.77.104506
Abstract
Recently, angle-resolved photoemission spectroscopy (ARPES) has revealed a dispersion anomaly at high binding energy near 0.3-0.5eV in various families of the high-temperature superconductors. For further studies of this anomaly we present a new two-dimensional fitting-scheme and apply it to high-statistics ARPES data of the strongly-overdoped Bi2Sr2CuO6 cuprate superconductor. The procedure allows us to extract theself-energy in an extended energy and momentum range. It is found that the spectral function of Bi2Sr2CuO6 can be parameterized using a small set of tight-binding parameters and a weakly-momentum-dependent self-energy up to 0.7 eV in binding energy and over the entire first Brillouin zone. Moreover the analysis gives an estimate of the momentum dependence of the matrix element, a quantity, which is often neglected in ARPES analyses.
8 pages, 5 figures
References in corpus (13)
- A universal high energy anomaly in angle resolved photoemission spectra of high temperature superconductors - possible evidence of spinon and holon branches
- Kinks in the dispersion of strongly correlated electrons
- High-energy kink in high-temperature superconductors
- The hierarchy of multiple many-body interaction scales in high-temperature superconductors
- Self-consistent self-energy analysis of photoemission data
- Bare electron dispersion from photoemission experiments
- High-energy scale revival and giant kink in the dispersion of a cuprate superconductor
- "Waterfalls" phenomenon in superconducting cuprates
- "Waterfalls" in cuprates
- High energy kink in the single particle spectra of the two-dimensional Hubbard model
- String excitations of a hole in a quantum antiferromagnet and photoelectron spectrospopy
- Paramagnon-induced dispersion anomalies in the cuprates
- Electron Removal Self Energy and its application to Ca2CuO2Cl2