Eliashberg function in an amorphous simple metal alloy Sn[sub 1[minus][ital x]]Cu[sub [ital x]] determined by electron tunneling
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- NMT-5, MSE506, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Physics Department, Texas A M University, College Station, Texas 77843-4242 (United States)
Superconducting tunneling measurements for amorphous Sn[sub 1[minus][ital x]]Cu[sub [ital x]] (0.08[le][ital x][le]0.41) have been inverted to determine the Eliashberg function [alpha][sup 2][ital F]([omega]) as the electron-phonon coupling parameter [lambda] and the superconducting transition temperature [ital T][sub [ital c]] decrease from 1.8 to 1.0 and 6.87 K to 3.91 K, respectively, with the Cu content. The best fit to the experimental tunneling data was given with a linear dependence for [alpha][sup 2][ital F]([omega]) at low frequencies for all compositions. This linear dependence is consistent with the model for phonon damping proposed by Belitz and Wybourne (following paper) which properly incorporates electronic damping but also includes a strong nonelectronic contribution.
- OSTI ID:
- 6712451
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:1; ISSN PRBMDO; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360107 -- Metals & Alloys-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
BINARY ALLOY SYSTEMS
COPPER ALLOYS
COUPLING
ELECTRON-PHONON COUPLING
ENERGY GAP
FREQUENCY DEPENDENCE
FUNCTIONS
GORKOV-ELIASHBERG THEORY
PHYSICAL PROPERTIES
SPECTRAL FUNCTIONS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TIN BASE ALLOYS
TRANSITION TEMPERATURE
TUNNEL EFFECT
360107 -- Metals & Alloys-- Superconducting Properties-- (1992-)
665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY SYSTEMS
ALLOYS
AMORPHOUS STATE
BINARY ALLOY SYSTEMS
COPPER ALLOYS
COUPLING
ELECTRON-PHONON COUPLING
ENERGY GAP
FREQUENCY DEPENDENCE
FUNCTIONS
GORKOV-ELIASHBERG THEORY
PHYSICAL PROPERTIES
SPECTRAL FUNCTIONS
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
THERMODYNAMIC PROPERTIES
TIN ALLOYS
TIN BASE ALLOYS
TRANSITION TEMPERATURE
TUNNEL EFFECT