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Title: Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device

We propose a scheme to measure both the current-phase relation and differential conductance dI/dV of a superconducting junction, in the normal and the superconducting states. This is done using a dc Superconducting Quantum Interference Device with two Josephson junctions in parallel with the device under investigation and three contacts. As a demonstration, we measure the current-phase relation and dI/dV of a small Josephson junction and a carbon nanotube junction. In this latter case, in a regime where the nanotube is well conducting, we show that the non-sinusoidal current phase relation we find is consistent with the theory for a weak link, using the transmission extracted from the differential conductance in the normal state. This method holds great promise for future investigations of the current-phase relation of more exotic junctions.
Authors:
; ; ; ; ;  [1]
  1. Laboratoire de Physique des Solides, Université Paris-Sud, CNRS, UMR 8502, F-91405 Orsay Cedex (France)
Publication Date:
OSTI Identifier:
22308980
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 2; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARBON NANOTUBES; CURRENTS; ELECTRIC CONDUCTIVITY; ELECTRIC CONTACTS; HYBRID SYSTEMS; JOSEPHSON JUNCTIONS; SEMICONDUCTOR JUNCTIONS; SQUID DEVICES; SUPERCONDUCTING JUNCTIONS; TRANSMISSION