Electron and phonon kinetics in a nonequilibrium Josephson junction

Journal Article · Mon Jul 01 04:00:00 EDT 1985 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:6276618

Gulyan, A M; Zharkov, G F

The correct expression for a tunneling source is obtained taking account of the macroscopic phase coherence in a Josephson junction and the imbalance between the electron-hole excitation branches. The canonical forms of the electron-electron, electron-phonon, and phonon-electron inelastic collision operators are derived with allowance for the imbalance. The phenomenon of quantum oscillations of a tunneling source is discussed. This phenomenon gives rise to the oscillation of the electron distribution function in the nonequilibrium layer of the junction between two superconductors, as a result of which a chemical-potential-shift ''jitter'' arises and satellites are also formed in the radiation scattered by the junction. The spectral dependence of the phonon fluxes from a nonequilibrium junction is studied with the use of the results obtained in a numerical analysis of the kinetics of the electron-hole excitations. It is shown that the previously discussed phonon-deficit effect should occur even when the superconductors contain excess quasiparticles produced by the field from the pair condensate. The behavior of the current in a nonequilibrium junction is also analyzed. The current-voltage characteristics in the near-threshold voltage regime are calculated. Allowance for the nonequilibrium effects may affect the qualitative disagreement between the well-known experimental results obtained in the measurement of the ''interference'' (phase-difference dependent) conductivity of the Josephson junction and the predictions of the equilibrium theory of tunneling.

• Research Organization: Institute of Physics Research, Academy of Sciences of the Armenian SSR: P. N. Lebedev Physics Institute, Academy of Sciences of the USSR
• OSTI ID: 6276618
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 62:1; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-ELECTRON COUPLING
ELECTRON-PHONON COUPLING
JOSEPHSON JUNCTIONS
JUNCTIONS
OSCILLATIONS
PHYSICAL PROPERTIES
SUPERCONDUCTING JUNCTIONS
TUNNEL EFFECT