Bridging k- and q- Space in the Cuprates: Comparing ARPES and STM Results
Abstract
A critical comparison is made between the ARPES-derived spectral function and STM studies of Friedel-like oscillations in Bi2Sr2CaCu2O8+delta (Bi2212). The data can be made approximately consistent, provided that (a) the elastic scattering seen in ARPES is predominantly small-angle scattering and (b) the `peak' feature seen in ARPES is really a dispersive `bright spot', smeared into a line by limited energy resolution; these are the `bright spots' which control the quasiparticle interferences. However, there is no indication of bilayer splitting in the STM data.
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