Abstract
In considering the α-CU₁₀₀₋ₓGeₓ alloys on the basis of a realistic muffin-tin Hamiltonian, the most notable feature of the electronic spectra is found to be the appearance of an impurity band below the host conduction band. In accord with relevant experiments, a Fermi surface is predicted to grow at approximately half the rigid-band rate for x5 at.% Ge. This effect is related to a transition in the nature of states associated with the impurity band; these states are localized atomic s-like states for x≤0.5 and become delocalized in concentrated alloys.
Keywords
muffin-tin Hamiltonian, alpha phase copper germanium alloys, α-CU₁₀₀₋ₓGeₓ
Subject Categories
Fermi surfaces, Alloys
Disciplines
Physics
Publisher
American Physical Society
Publication Date
1-11-1982
Rights Information
Copyright 1982 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Prasad, R. and Bansil, A., "Nonlinear composition dependence of the Fermi-surface dimensions in alpha-phase copper-germanium alloys" (1982). Physics Faculty Publications. Paper 404.
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Notes
Originally published in Physical Review Letters v.48 (1982): 113-116. DOI: 10.1103/PhysRevLett.48.113