Measurement of the current-phase relation of superconducting atomic contacts.
We have probed the current-phase relation of an atomic contact placed with a tunnel junction in a small superconducting loop. The measurements are in quantitative agreement with the predictions of a resistively shunted SQUID model in which the Josephson coupling of the contact is calculated using the independently determined transmissions of its conduction channels.
Della Rocca
M L
ML
Quantronics group, Service de Physique de l'Etat Condensé (CNRS URA 2464) DSM/DRECAM, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France.
Chauvin
M
M
Huard
B
B
Pothier
H
H
Esteve
D
D
Urbina
C
C