OBSERVATION OF JOSEPHSON SELF-COUPLING IN NB ALOX/NB TUNNEL-JUNCTIONS/

Authors
MAEZAWA M AOYAGI M NAKAGAWA H KUROSAWA I TAKADA S
Citation
M. Maezawa et al., OBSERVATION OF JOSEPHSON SELF-COUPLING IN NB ALOX/NB TUNNEL-JUNCTIONS/, Physical review. B, Condensed matter, 50(13), 1994, pp. 9664-9667
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
50
Issue
13
Year of publication
1994
Pages
9664 - 9667
Database
ISI
SICI code
0163-1829(1994)50:13<9664:OOJSIN>2.0.ZU;2-B
Abstract
We present the observation of Josephson self-coupling in Nb/AlO(x)/Nb tunnel junctions. In current-voltage characteristics, anomalous subhar monic gap structures were observed; steep current steps and peaks whic h were sensitive to the magnetic field appeared at the voltages of 2DE LTA/3e and 2DELTA/5e. The characteristics of these structures could no t be explained by multiparticle tunneling and/or multiple Andreev refl ection. We conclude that the structures at 2DELTA/3e and 2DELTA/5e are due to Josephson self-coupling.