Angle-resolved photoemission spectroscopy of band tails in lightly doped cuprates
journal contributionposted on 19.02.2009 by A.S. Alexandrov, Kimberley Reynolds
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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 “quasiparticle” 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-localized states in the charge-transfer gap of doped cuprates.