Inhomogeneous Resistivity of Transparent Superconductor Films Revealed by the Van Der Pauw Technique
A. Shapovalov$^{1}$, D. Menesenko$^{1,2}$, E. Zhitlukhina$^{3,4}$, A. Parra$^{5}$, A. Aliev$^{5}$, V. Shamaev$^{6}$, M. Gregor$^{4}$, T. Plecenik$^{4}$
$^{1}$Kyiv Academic University, N.A.S. and M.E.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{3}$Donetsk Institute for Physics and Engineering Named after O. O. Galkin, NAS of Ukraine, 72 R. Luxembourg Str., 83114 Donetsk, Ukraine
$^{4}$Centre for Nanotechnology and Advanced Materials, Comenius University Bratislava, F2 Mlynská dolina, 84248 Bratislava, Slovak Republic
$^{5}$Alan G. MacDiarmid NanoTech Institute, University of Texas at Dallas, 800 West Campbell Road., TX-75080 Richardson, USA
$^{6}$Donetsk National Technical University, 2 Shybankov Sqr., UA-85300 Pokrovs’k, Ukraine
Received: 08.04.2024; final version - 06.05.2024. Download: PDF
Detection of structural and transport inhomogeneities in superconducting thin films using the standard four-probe method requires multiple measurements and may be inaccurate. A new approach to extract the information about the inhomogeneous transition into the superconducting state using van der Pauw technique is presented. The proposed method is applied to an electrochemically-reduced In–Sn-oxide (ITO) films known to be simultaneously transparent and superconducting. Relationship between the processing parameters and superconducting characteristics of the ITO films is considered, and prospects for using such samples in integrated photonic-superconducting chips for quantum-information processing are discussed.
Key words: transparent superconductivity, doped In–Sn oxide, four-point resistance, temperature and angular dependences.
URL: https://mfint.imp.kiev.ua/en/abstract/v46/i06/0517.html
DOI: https://doi.org/10.15407/mfint.46.06.0517
PACS: 73.63.Rt, 74.25.Gz, 74.78.-w, 74.81.-g, 75.47.Lx, 84.37.+q, 85.25.Am
Citation: A. Shapovalov, D. Menesenko, E. Zhitlukhina, A. Parra, A. Aliev, V. Shamaev, M. Gregor, and T. Plecenik, Inhomogeneous Resistivity of Transparent Superconductor Films Revealed by the Van Der Pauw Technique, Metallofiz. Noveishie Tekhnol., 46, No. 6: 517—529 (2024)