Damping factor measurement of the Riedel singularity in niobium point contact Josephson junctions

Journal Article · Sun Apr 15 04:00:00 EST 1984 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.333292· OSTI ID:5180204

Vernet, G; Henaux, J; Adde, R

A new experimental method is presented to investigate directly the far-infrared frequency dependence of the Josephson ac current amplitude near the superconducting gap. The lowest value of the damping factor delta of the Riedel singularity in niobium contacts at 4 K is found to be delta = (2/sup +2//sub -/1) x 10/sup -3/ and is attributed to quasiparticle damping.

• Research Organization: Institut d'Electronique Fondamentale, Batiment 220, Universite Paris Sud, 91405 Orsay Cedex, France
• OSTI ID: 5180204
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 55:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
CURRENTS
DAMPING
ELECTRIC CONTACTS
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUIPMENT
FREQUENCY DEPENDENCE
INFRARED RADIATION
JOSEPHSON JUNCTIONS
JUNCTIONS
METALS
NIOBIUM
QUASI PARTICLES
RADIATIONS
SINGULARITY
SUPERCONDUCTING JUNCTIONS
TRANSITION ELEMENTS
ULTRALOW TEMPERATURE