Collective excitations in superconductors below T/sub c/

Journal Article · Sun Oct 01 04:00:00 EDT 1978 · Phys. Rev., B: Solid State; (United States)

DOI:https://doi.org/10.1103/PhysRevB.18.3163· OSTI ID:6850849

Dinter, M

Fluctuations of tunneling currents through Josephson junctions are investigated for clean superconductors in the vicinity below T/sub c/. The collective quasiparticle excitations, leading to a maximum in the structure function of the order-parameter phase, also affect the longitudinal dielectric function epsilon. A minimum in Im(1/epsilon) is the counterpart to the phase maximum. It is also present in dirty samples, but disappears in the gapless case. The longitudinal ultrasonic spectrum is discussed for clean and dirty probes. Besides the ordinary sound one finds a second maximum in the spectrum on account of the collective motion of the electrons below T/sub c/.

• Research Organization: Department of Physics, University of California, Santa Barbara, California 93106
• OSTI ID: 6850849
• Journal Information: Phys. Rev., B: Solid State; (United States), Journal Name: Phys. Rev., B: Solid State; (United States) Vol. 18:7; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FLUCTUATIONS
JOSEPHSON JUNCTIONS
ORDER PARAMETERS
PHYSICAL PROPERTIES
SOUND WAVES
SUPERCONDUCTING JUNCTIONS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TUNNEL EFFECT
ULTRASONIC WAVES
VARIATIONS