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Coherent potential theory of a random binary alloy Effects of scattering from two-sites clusters and off-diagonal randomnessExtension of the single-site coherent potential approximation for random binary alloys to include the effect of off-diagonal randomness and pair scattering. This extension is achieved by analyzing a one-band model of a random binary alloy in terms of a two-sites coherent potential approximation. Numerical results are presented for a number of different alloys. In the overlapping-band case, the presence of off-diagonal randomness is shown to modify the bandwidths to values larger than those obtained from the virtual-crystal approximation. A simple iterative procedure is described for overcoming the convergence difficulties in the split-band case. In this limit, the inclusion of pair scattering and off-diagonal randomness is found to lead to the appearance of structure in the density of states of the minority component band.
Document ID
19740046496
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Moorjani, K.
(Johns Hopkins University Silver Spring, Md., United States)
Tanaka, T.
(Catholic University of America, Washington, D.C., United States)
Sokoloski, M. M.
(U.S. Army, Harry Diamond Laboratories, Washington D.C., United States)
Bose, S. M.
(Drexel University Philadelphia, Pa., United States)
Date Acquired
August 7, 2013
Publication Date
March 21, 1974
Publication Information
Publication: Journal of Physics
Subject Category
Physics, Solid-State
Accession Number
74A29246
Funding Number(s)
CONTRACT_GRANT: NGR-09-005-072
CONTRACT_GRANT: NAVY TASK A13B
CONTRACT_GRANT: NGR-21-009-033
CONTRACT_GRANT: N00017-72-C-4401
Distribution Limits
Public
Copyright
Other

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