2011/06/07 by S. Dzhumanov, Dzhumanov, S., O.K. Ganiev +3
Chemistry · Engineering · Physics and Astronomy · #F.2.2 #FOS: Physical sciences #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #Superconducting Materials and Applications #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.1106.1308
openalex publication_date 2011/06/07 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose a model of quasiparticle tunneling across the high-Tc superconductor-insulator-normal metal junction based on the different mechanisms for tunneling of electrons at positive bias and dissociating polaronic Cooper pairs and large polarons at negative bias, and the gap inhomogeneity (i.e., multi-gap) picture. We show that the main features of the tunneling spectra such as low-bias U- and V-shaped features, asymmetry and high-bias dip-hump features, their temperature and doping dependences, and shoulders inside the conductance peaks observed in high-Tc cuprates arise naturally from the model. The experimental tunneling spectra of \rmBa2Sr2CaCu2O8+δ are fitted quite well by taking into account the distribution of BCS and polaronic gap values.