Nanopattern-stimulated superconductor-insulator transition in thin TiN films

Abstract

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.

6 pages, 4 figures

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• Quantum criticality at the superconductor to insulator transition revealed by specific heat measurements
• Quantum criticality at the superconductor insulator transition probed by the Nernst effect
• Effect of half-quantum vortices on magnetoresistance of perforated superconducting films
• Resistive transition in frustrated Josephson-junction arrays on a honeycomb lattice
• Tunneling probe of fluctuating superconductivity in disordered thin films
• Vortex pinning vs superconducting wire network: origin of periodic oscillations induced by applied magnetic fields in superconducting films with arrays of nanomagnets
• Magnetic flux disorder and superconductor-insulator transition in nanohole thin films
• Superconducting quantum oscillations and anomalous negative magnetoresistance in a honeycomb nanopatterned oxide interface superconductor
• Superconducting nanowire quantum interference device based on Nb ultrathin films deposited on self-assembled porous Si templates
• Superconducting-insulator transition in disordered Josephson junctions networks
• Gate-tunable electron interaction in high-κ dielectric films
• Origin of Matching Effect in Anti-dot Array of Superconducting NbN Thin Films
• Critical exponents and fine-grid vortex model of the dynamic vortex Mott transition in superconducting arrays
• Transport Measurements on Nano-engineered Two Dimensional Superconducting Wire Networks
• Random gauge models of the superconductor-insulator transition in two-dimensional disordered superconductors
• Little-Parks Effect Governed by Magnetic Nanostructures with Out-of-Plane Magnetization Little-Parks Effect Governed by Magnetic Nanostructures with Out-of-Plane Magnetization
• Critical behavior at the dynamic Mott transition
• Proximitized insulators from disordered superconductors