The coupling of Josephson oscillations in layered superconductors is studied with help of a tunneling Hamiltonian formalism. The general form of the current density across the barriers between the superconducting layers is derived. The induced charge fluctuations on the superconducting layers lead to a coupling of the Josephson oscillations in different junctions. A simplified set of equations is then used to study the non-linear dynamics of the system. In particular the influence of the coupling on the current-voltage characteristics is investigated and upper limits for the coupling strength are estimated from a comparison with experiments on cuprate superconductors.

Date Published: 9 December 1998
PDF: 9 pages
Proc. SPIE 3480, Superconducting Superlattices II: Native and Artificial, (9 December 1998); doi: 10.1117/12.332438

Published in SPIE Proceedings Vol. 3480:
Superconducting Superlattices II: Native and Artificial
Ivan Bozovic; Davor Pavuna, Editor(s)