Spin-orbit effects in the band structure of Bi2Sr2Ca1Cu2O8

Abstract Korringa-Kohn-Rostoker (KKR) calculations are performed for the high-temperature superconductor compound Bi 2 Sr 2 Ca 1 Cu 2 O 8 both semi-relativistically and fully relativistically in order to investigate the influence of spin-orbit interaction. While the overall features of the two band structures turn out to be very similar, a small dropping of the Fermi energy leads to better agreement with angle-resolved photoemission experiments. However, the deviation from angle- integrated photoemission experiments remains unchanged.