Interrelation between the pseudogap and the incoherent quasi-particle   features of high-Tc superconductors
  Using a scenario of a hybridized mixture of localized bipolarons and conduction electrons, we demonstrate for the latter the simultaneous appearance of a pseudogap and of strong incoherent contributions to their quasi-particle spectrum which arise from phonon shake-off effects. This can be traced back to temporarily fluctuating local lattice deformations, giving rise to a double-peak structure in the pair distribution function, which should be a key feature in testing the origin of these incoherent contributions, recently seen in angle-resolved photoemission spectroscopy (ARPES). 
J. Ranninger (1) and A. Romano (2) ((1) CRTBT-CNRS, Grenoble, France,   (2) Universita' di Salerno, Italy)