Charge-imbalance fluctuations in superconductors

Journal Article · Thu Oct 01 04:00:00 EDT 1981 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.24.4105· OSTI ID:6064141

Lemberger, T R

We calculate that the mean-square amplitude of the fluctuations of the condensate chemical potential ..mu../sub s/ due to charge-imbalance fluctuations in the limit ..delta../k/sub B/T<<1 is <(delta..mu../sub s/)/sup 2/> = 2(k/sub B/T)/sup 2//..pi..delta..cap omega..N(0) in a volume ..cap omega.. of superconductor. We relate these fluctuations via Nyquist's theorem to measured values of the contribution of self-injected charge imbalance to the dc resistance of SIN tunnel junctions. In this relation the dynamic charge-imbalance relaxation rate is 1/tau/sub E/, the electron-phonon scattering rate.

• Research Organization: Department of Physics, University of California and Materials, and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720
• OSTI ID: 6064141
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 24:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CHARGE DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUCTUATIONS
JUNCTIONS
PHYSICAL PROPERTIES
RELAXATION
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TUNNEL EFFECT
VARIATIONS