Login / Signup

High Magnetic Field Stability in a Planar Graphene-NbSe 2 SQUID.

Ayelet ZalicTakashi TaniguchiKenji WatanabeSnir GazitHadar Steinberg
Published in: Nano letters (2023)
Thin NbSe 2 retains superconductivity at a high in-plane magnetic field up to 30 T. In this work we construct a novel atomically thin, all van der Waals SQUID, in which current flows between NbSe 2 contacts through two parallel graphene weak links. The 2D planar SQUID remains uniquely stable at high in-plane field, which enables tracing critical current interference patterns as a function of the field up to 4.5 T. From these we extract the evolution of the current distribution up to high fields, demonstrating sub-nanometer sensitivity to deviation of current flow from a perfect atomic plane and observing a field-driven transition in which supercurrent redistributes to a narrow channel. We further suggest a new application of the asymmetric SQUID geometry to directly probe the current density in the absence of phase information.
Keyphrases
  • oxidative stress
  • healthcare
  • quantum dots
  • anti inflammatory