Anomalous modulation of Josephson radiation in nanowire-based Josephson junctions

Research output: Contribution to journalArticle

Abstract

We investigate the Josephson radiation of nanowire (NW)-based Josephson junctions in a parallel magnetic field. The Josephson junction made of an InAs NW with superconducting Al leads shows the emission spectra which follow the Josephson frequency over the range 4-8 GHz at zero magnetic field. We observe an apparent deviation of the emission spectra from the Josephson frequency which is accompanied by a strong enhancement of the switching current above a magnetic field of ∼300 mT. The observed modulations can be understood to reflect trivial changes in the superconducting circuit surrounding the device which is strongly affected by the applied magnetic field. Our findings will provide a way to accurately investigate topological properties in NW-based systems.

Details

Authors
Organisations
External organisations
  • RIKEN Nishina Center for Accelerator-Based Science
  • University of Tokyo
  • Peking University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
Original languageEnglish
Article number041302
JournalPhysical Review B
Volume98
Issue number4
Publication statusPublished - 2018 Jul 19
Publication categoryResearch
Peer-reviewedYes