PHENOMENOLOGICAL MODEL OF ELECTRONS COUPLED TO PARAMAGNONS - HOW TO UNDERSTAND PHOTOEMISSION EXPERIMENTS

We compute the spectral function of electrons coupled to antiferromagnetic paramagnons following closely a phenomenological approach by Kampf and Schrieffer[1]. The results are used to interpret the presence of superstructures (''shadow bands'') and other features recently observed, close to the Fermi surface, in metallic cuprates. An electron paramagnon coupling constant can be estimated by comparing theoretical and experimental spectra.