Electronic structure of disordered CuPd alloys: A two-dimensional positron-annihilation study

Journal Article · Sun Nov 22 23:00:00 EST 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.59.2479· OSTI ID:5800548

Smedskjaer, L C; Benedek, R; Siegel, R W; Legnini, D G; Stahulak, M D; Bansil, A

Two-dimensional--angular-correlation experiments using posi- tron-annihilation spectroscopy were performed on a series of disordered Cu-rich CuPd-alloy single crystals. The results are compared with theoretical calculations based on the Korringa-Kohn-Rostoker coherent-potential approximation. Our experiments confirm the theoretically predicted flattening of the alloy Fermi surface near (110) with increasing Pd concentration. The momentum densities and the two-dimensional--angular-correlation spectra around zero momentum exhibit a characteristic signature of the electronic states near the valence-band edge in the alloy.

• Research Organization: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5800548
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 59:21; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANGULAR CORRELATION
ANNIHILATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BASIC INTERACTIONS
COPPER ALLOYS
COPPER BASE ALLOYS
CORRELATIONS
CRYSTALS
ELECTROMAGNETIC INTERACTIONS
ELECTRONIC STRUCTURE
ELEMENTARY PARTICLES
FERMIONS
INTERACTIONS
LEPTONS
MONOCRYSTALS
PALLADIUM ALLOYS
PLATINUM METAL ALLOYS
POSITRONS
RANDOMNESS
TWO-DIMENSIONAL CALCULATIONS