Higher-order effects on Shapiro steps in Josephson junctions

Authors
Rasmussen, KO Zharnitsky, V Mitkov, I Gronbech-Jensen, N
Citation
Ko. Rasmussen et al., Higher-order effects on Shapiro steps in Josephson junctions, PHYS REV B, 59(1), 1999, pp. 58-61
Citations number
18
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
59
Issue
1
Year of publication
1999
Pages
58 - 61
Database
ISI
SICI code
0163-1829(19990101)59:1<58:HEOSSI>2.0.ZU;2-0
Abstract
We demonstrate that the well known phase-locking mechanism leading to Shapi ro steps in ac-driven Josephson junctions is always accompanied by a higher -order phase-locking mechanism similar to that of the parametrically driven pendulum. This effect, resulting in a pi-periodic effective potential for the phase, manifests itself clearly in the parameter regions when the usual Shapiro steps are expected to vanish. [S0163-1829(99)02502-3].