Effects of disorder on properties of A15 materials

Journal Article · Fri Oct 01 04:00:00 EDT 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.26.3673· OSTI ID:6880056

Soukoulis, C M; Papaconstantopoulos, D A

We have calculated the effects of disorder on the density of states, Fermi velocity, and Drude plasma frequency for V and its A15 compounds V/sub 3/ X, with X = Al, Ga, Ge, Si, and Sn, and for Nb and its A15 compounds Nb/sub 3/ X, with X = Al, Ga, Ge, Si, Sn, and Sb using the electron-lifetime model and the results of band-structure calculations. In most cases the density of states and the superconducting transition temperature T/sub c/ are found to decrease with increasing disorder, in qualitative agreement with experiment. Exceptions are Nb/sub 3/Sb and Nb/sub 3/Si, for which we have found a small increase in T/sub c/. We are also presenting calculations of the effects of disorder on the mean free path, BCS coherence length, London penetration depth, Ginzburg-Landau kappa, and the temperature dependence of the upper critical field for the above materials. Comparison with the exisiting experimental data is made.

• Research Organization: Corporate Research Science Laboratories, Exxon Research and Engineering Company, Linden, New Jersey 07036
• OSTI ID: 6880056
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656101 -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ANTIMONY COMPOUNDS
BAND THEORY
BCS THEORY
BETA-W LATTICES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
ELEMENTS
ENERGY-LEVEL DENSITY
GALLIUM COMPOUNDS
GERMANIUM COMPOUNDS
GINZBURG-LANDAU THEORY
METALS
NIOBIUM
NIOBIUM COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
THERMODYNAMIC PROPERTIES
TIN COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
VANADIUM
VANADIUM COMPOUNDS