2008/03/04 by W. Meevasana, F. Baumberger, K. Tanaka +12 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.77.104506
published as PHYS. REV. B 77, 104506 (2008) · 8 pages, 5 figures
openalex publication_date 2008/03/04 · arxiv created 2008/03/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Recently, angle-resolved photoemission spectroscopy (ARPES) has revealed a dispersion anomaly at high binding energy near 0.3--0.5\phantom\rule0.3em0exeV 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\phantom\rule0.3em0exeV 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.