Quasispin-operator description of the Josephson tunnel junction and the Josephson plasma frequency

Journal Article · Wed Feb 01 04:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.2173· OSTI ID:6433722

Unnerstall, T; Rieckers, A

This work deals with the description of the Josephson junction by means of quasispin operators. Several approximations of previous such treatments known as the pseudo-angular-momentum theory are dispensed with, and special care is taken to describe the charge imbalance across the junction in a physically proper way. The ensuing microscopic theory can be evaluated rigorously up to a very small error, yielding a closed system of dynamical equations for the macroscopic behavior of the junction which exhibit additional terms as compared to the usual Josephson relations. These terms leave the Josephson frequency practically unchanged, but are shown to yield a correction to the frequency of the Josephson plasma mode on the order of 1%.

• Research Organization: Institut fuer Theoretische Physik der Universitaet Tuebingen, Auf der Morgenstelle 14, D-7400 Tuebingen, Federal Republic of Germany
• OSTI ID: 6433722
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:4; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANGULAR MOMENTUM OPERATORS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
INSTABILITY
JOSEPHSON JUNCTIONS
JUNCTIONS
LOW TEMPERATURE
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
PHYSICAL PROPERTIES
PLASMA INSTABILITY
QUANTUM OPERATORS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTIVITY