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

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