Quantum phase slips and number-phase duality in disordered TiN nanostrips

I. Schneider, K. Kronfeldner, T. I. Baturina, C. Strunk

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3 Citations (Scopus)

Abstract

We have measured the electric transport properties of TiN nanostrips with different widths. At zero magnetic field, the temperature-dependent resistance R(T) saturates at a finite resistance toward low temperatures, which results from quantum phase slips in the narrower strips. We find that the current-voltage (I-V) characteristics of the narrowest strips are equivalent to those of small Josephson junctions. Applying a transverse magnetic field drives the devices into a reentrant insulating phase, with I-V characteristics dual to those in the superconducting regime. The results provide evidence that our critically disordered superconducting nanostrips behave like small self-organized random Josephson networks.

Original languageEnglish
Article number094522
Number of pages10
JournalPhysical Review B
Volume99
Issue number9
DOIs
Publication statusPublished - 29 Mar 2019

Keywords

  • SUPERCONDUCTING NANOWIRES
  • JOSEPHSON
  • FLUCTUATIONS
  • TRANSITION
  • OSCILLATIONS
  • SCALE
  • DC

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