Angle-resolved photoemission spectroscopy of band tails in lightly doped cuprates
Alexandrov, A. S.
Condensed Matter - Strongly Correlated Electrons | Condensed Matter - Superconductivity
arxiv: Condensed Matter::Quantum Gases | Condensed Matter::Strongly Correlated Electrons | Condensed Matter::Materials Science | Condensed Matter::Superconductivity
We amend ab initio strongly-correlated band structures by taking into account the band-tailing phenomenon in doped charge-transfer Mott-Hubbard insulators. We show that the photoemission from band tails accounts for sharp "quasi-particle" peaks, rapid loss of their intensities in some directions of the Brillouin zone ("Fermi-arcs") and high-energy "waterfall" anomalies as a consequence of matrix-element effects of disorder-localised states in the charge-transfer gap of doped cuprates.