Modeling study of peak-dip-hump structure in tunneling spectra of high-temperature superconducting cuprates

We propose new specific model for quasiparticle (QP) tunneling across the superconductor-insulator-normal metal (SIN) junction based on two mechanisms. Origin of the many features of the tunneling spectra, such as peak-dip-hump (PDH) structure, U- and V-shapes, temperature dependence of differential tunneling conductance, asymmetric conductance peaks, zero-bias conductance, subgap feature and gap inhomogeneity have been explained by the proposed model. We show that the energy scales of the binding energies of large polarons and polaronic Cooper pairs are identified by pseudogap (PG) crossover temperature on the cuprate phase diagram.