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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

Abstract

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

Citation Formats

Basset, J., Delagrange, R., Weil, R., Kasumov, A., Bouchiat, H., and Deblock, R. Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device. United States: N. p., 2014. Web. doi:10.1063/1.4887354.
Basset, J., Delagrange, R., Weil, R., Kasumov, A., Bouchiat, H., & Deblock, R. Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device. United States. doi:10.1063/1.4887354.
Basset, J., Delagrange, R., Weil, R., Kasumov, A., Bouchiat, H., and Deblock, R. Mon . "Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device". United States. doi:10.1063/1.4887354.
@article{osti_22308980,
title = {Joint measurement of current-phase relations and transport properties of hybrid junctions using a three junctions superconducting quantum interference device},
author = {Basset, J. and Delagrange, R. and Weil, R. and Kasumov, A. and Bouchiat, H. and Deblock, R.},
abstractNote = {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.},
doi = {10.1063/1.4887354},
journal = {Journal of Applied Physics},
number = 2,
volume = 116,
place = {United States},
year = {Mon Jul 14 00:00:00 EDT 2014},
month = {Mon Jul 14 00:00:00 EDT 2014}
}