Extracting the spectral function of the cuprates by a full two-dimensional analysis: Angle-resolved photoemission spectra of Bi2Sr2CuO6

W. Meevasana, F. Baumberger, K. Tanaka, F. Schmitt, W. R. Dunkel, D. H. Lu, S. -K. Mo, H. Eisaki, Z. -X. Shen

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Recently, angle-resolved photoemission spectroscopy (ARPES) has revealed a dispersion anomaly at high binding energy near 0.3-0.5 eV 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 the self-energy in an extended energy and momentum range. It is found that the spectral function of Bi2Sr2CuO6 can be parametrized 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.

Original languageEnglish
Number of pages7
JournalPhysical Review. B, Condensed matter and materials physics
Volume77
DOIs
Publication statusPublished - Mar 2008

Keywords

  • CORRELATED ELECTRONS
  • SUPERCONDUCTORS

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