Nanopattern-stimulated superconductor-insulator transition in thin TiN films

We present the results of the comparative study of the influence of disorder on transport properties in continuous and nanoperforated TiN films. We show that nanopatterning turns a thin TiN film into an array of superconducting weak links and stimulates both, the disorder- and magnetic field-driven...

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Bibliographic Details
Published in:arXiv.org 2010-11
Main Authors: Baturina, T I, Vinokur, V M, A Yu Mironov, Chtchelkatchev, N M, Nasimov, D A, Latyshev, A V
Format: Article
Language:English
Subjects:
Comparative studies
Magnetoresistance
Magnetoresistivity
Oscillations
Superconductivity
Thin films
Titanium nitride
Transport properties
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Summary:We present the results of the comparative study of the influence of disorder on transport properties in continuous and nanoperforated TiN films. We show that nanopatterning turns a thin TiN film into an array of superconducting weak links and stimulates both, the disorder- and magnetic field-driven superconductor-to-insulator transitions, pushing them to lower degree of disorder. We find that nanopatterning enhances the role of the two-dimensional Coulomb interaction in the system transforming the originally insulating film into a more pronounced insulator. We observe magnetoresistance oscillations reflecting collective behaviour of the multiconnected nanopatterned superconducting film in the wide range of temperatures and uncover the physical mechanism of these oscillations as phase slips in superconducting weak link network.
ISSN:2331-8422
DOI:10.48550/arxiv.1011.1592