Interrelation between the Pseudogap and the Incoherent Quasiparticle Features of High- Tc Superconductors

J. Ranninger; A. Romano

doi:10.1103/PhysRevLett.80.5643

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Interrelation between the Pseudogap and the Incoherent Quasiparticle Features of High- Tc Superconductors

J. Ranninger, A. Romano

DOI 10.1103/PhysRevLett.80.5643 · Physical Review Letters

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Abstract

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 quasiparticle spectrum which arise from phonon shakeoff 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.