Interrelation between the pseudogap and the incoherent quasi-particle features of high-Tc superconductors

摘要

Using a scenario of a hybridized mixture of localized bipolarons andconduction electrons, we demonstrate for the latter the simultaneous appearanceof a pseudogap and of strong incoherent contributions to their quasi-particlespectrum which arise from phonon shake-off effects. This can be traced back totemporarily fluctuating local lattice deformations, giving rise to adouble-peak structure in the pair distribution function, which should be a keyfeature in testing the origin of these incoherent contributions, recently seenin angle-resolved photoemission spectroscopy (ARPES).