Analysis of Anomalous Dips in the Differential Conductivity of Heterostructures Based on Superconductors

E. S. Zhitlukhina$^{1,2}$

$^{1}$Donetsk Institute for Physics and Engineering Named after O. O. Galkin, NAS of Ukraine, 46 Nauky Ave., UA-03028 Kyiv, Ukraine
$^{2}$Vasyl’ Stus Donetsk National University, 21 600-richchya Str., UA-21021 Vinnytsia, Ukraine

Received: 15.03.2021. Download: PDF

As found, the physical nature of anomalous dips in the differential conductance spectra of heterostructures based on superconducting metals is related to the presence of a nanoscale layer on their surface with partially or completely suppressed order parameter. The difference between tunnel junctions and point contacts is analyzed. As theoretically shown, the shot-noise measurements of the same samples provide additional information that substantially complements the data obtained from differential conductance spectra.

Key words: superconducting heterostructures, differential conductance, current fluctuations, point contacts.



PACS: 05.60.Gg, 73.20.-r, 73.40.Gk, 73.21.Ac, 73.63.Rt, 74.40.-n, 74.45.+c, 74.81.-g

Citation: E. S. Zhitlukhina, Analysis of Anomalous Dips in the Differential Conductivity of Heterostructures Based on Superconductors, Metallofiz. Noveishie Tekhnol., 43, No. 5: 579—591 (2021) (in Ukrainian)

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