https://doi.org/10.1140/epjb/s10051-023-00627-7
Regular Article - Solid State and Materials
Manifestation of peak-dip-hump structure in tunneling spectra of cuprates: a study by extended d-wave pairing symmetry
1
New Uzbekistan University, 100007, Tashkent, Uzbekistan
2
School of Engineering, Central Asian University, 111221, Tashkent, Uzbekistan
3
Institute of Nuclear Physics, AS RUz, 100214, Tashkent, Uzbekistan
4
Faculty of Physics, National University of Uzbekistan, 100174, Tashkent, Uzbekistan
5
Nukus State Pedagogical Institute Named After Ajiniyaz, 230105, Nukus, Uzbekistan
6
Joint Institute for Nuclear Research, 141980, Dubna, Russia
7
Umarov Physical-Technical Institute, 734063, Dushanbe, TAS, Tajikistan
8
Inha University in Tashkent, 100170, Tashkent, Uzbekistan
Received:
4
January
2023
Accepted:
21
November
2023
Published online:
4
December
2023
In this study, we examined the relationship between the angular and energy-dependent gap function and the peak-dip-hump structure observed in quasiparticle tunneling spectra within high-temperature superconductor–insulator–normal metal (HTSC-I-N) junctions. We analyzed the tunneling spectra in HTSC-I-N junctions, focusing on the peak-dip-hump structure, using the extended d-wave pairing symmetry and the polaron approach. We investigated two significant aspects of the tunneling spectra observed in experiments, namely, the temperature and doping-dependent evolution of the differential conductance. Furthermore, we estimated the dependence of the pseudogap on hole doping in the cuprate phase diagram by comparing the difference between the binding energies of large polarons and their Coulomb interaction energies. Our calculated results were then compared with experimental data. Importantly, we found a strong quantitative agreement between the theoretical predictions and the experimental observations in the considered cases.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
