Temperature and randomness dependence of the pair-breaking in superconducting aluminum films

Journal Article · Tue Nov 01 04:00:00 EST 1988 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00681982· OSTI ID:6099136

Shinozaki, B; Rinderer, L

Magnetoconductance and excess conductance due to superconducting fluctuations in aluminum films are measured in order to study the temperature dependence of the pair-breaking parameter delta at temperatures near T/sub c/. The parameter delta/sub M/ is estimated from the relation delta = ..pi../h bar//8k/sub B/T/tau//sub in/, where /tau//sub in/ is the inelastic scattering time deduced from the analysis of the magnetoconductance. The parameter delta/sub F/ is determined by fitting theories to data on the excess conductance at zero magnetic field. It is shown that: (1) For films with a wide range of the sheet resistance R/sub square/, 12 /approx lt/ R/sub square/ /approx lt/ 200 ..cap omega..//square/, the temperature dependence of delta /sub M/ near T/sub c/ agrees well with the theory of Brenig et al. (2) For clean films with R/sub /square// /approx lt/ 100 ..cap omega..//square/, the value of delta/sub F/ analyzed with theories including the correction term to the Maki-Thompson contribution shows almost the same temperature dependence as delta/sub M/. In a film with R/sub/square// approx. = 200 ..cap omega..//square/, however, a discrepancy between delta/sub M/ and delta/sub F/ remains.

• Research Organization: Institut de Physique Experimentale de l'Universite de Lausanne (Switzerland)
• OSTI ID: 6099136
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 73:3-4; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM
COUPLING
ELASTIC SCATTERING
ELECTRIC CONDUCTIVITY
ELECTRIC FIELDS
ELECTRICAL PROPERTIES
ELECTRON-ELECTRON COUPLING
ELECTRON-PHONON COUPLING
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FILMS
FLUCTUATIONS
GINZBURG-LANDAU THEORY
INELASTIC SCATTERING
INTERMEDIATE COUPLING
L-S COUPLING
LEPTONS
MAGNETIC FIELDS
MAGNETORESISTANCE
METALS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TWO-DIMENSIONAL CALCULATIONS
VARIATIONS