Abstract
We consider the Fermi-surface properties of the α-Cu1-cZnc system over the composition range 0≤c≤0.3. Our calculations are based on the application of the self-consistent coherent potential approximation to the muffin-tin Hamiltonian. The predictions of the theory with respect to the radii kneck, k100, and k110, and the size and shape of the alloy Fermi surface in several planes in the Brillouin zone are in good agreement with the available positron annihilation measurements and with the predictions of the rigid-band model. We discuss how the hitherto unmeasured disorder smearing of the alloy Fermi surface may be amenable to a direct experimental determination in concentrated alloys. The dilute impurity limit is considered in detail. The computed changes in areas for several orbits are in good accord with the corresponding results of de Haas-van Alphen experiments. The predicted Dingle temperatures, however, agree with measurements only to within a factor of 2. It is hoped that the present work will encourage further measurements, especially of the disorder smearing of the Fermi surface in concentrated alloys.
Keywords
Fermi-surface properties, de Haas-van Alphen experiments, Dingle temperatures, α-Cu1-cZnc, muffin-tin Hamiltonian
Subject Categories
Fermi surfaces, Copper alloys, Zinc alloys
Disciplines
Physics
Publisher
American Physical Society
Publication Date
3-15-1981
Rights Information
Copyright 1981 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Prasad, R.; Papadopoulos, S. C.; and Bansil, A., "Fermi-surface properties of alpha-phase alloys of copper with zinc" (1981). Physics Faculty Publications. Paper 387.
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Notes
Originally published in Physical Review B v.23 (1981): 2607-2613. DOI: 10.1103/PhysRevB.23.2607