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We present the electronic density of states (DOS) in ordered and disordered Cu50Pd50 and Cu75Pd25 alloys calculated by using the linear muffin-tin orbitals (LMTO) method. For ordered alloys the results are obtained via self-consistent LMTO method. We then show how the LMTO parameters for pure Cu and pure Pd can be appropriately transferred to the ordered alloy calculation to produce results in excellent agreement with the self-consistent calculation. For disordered alloys we present the electronic DOS calculated via LMTO-recursion and LMTO-CPA methods, and study the effect of the deviation from the ideal lattice structure, due to different sizes of the Cu and the Pd atoms, on the DOS of these alloys. We also discuss how the scheme of transferring parameters from the pure components to the alloy can be used in the calculation for the disordered phase.
We discuss how, in the linear-muffin-tin-orbitals (LMTO) method, the potential parameters for an intermetallic compound can be estimated from those of the constituents. For ordered alloys we illustrate the scheme by comparing the electronic density of states (DOS) obtained in self-consistent calculations with that obtained with the potential parameters transferred from the pure components. Several examples are discussed. We discuss how the scheme can be used in performing almost self-consistent calculations for disordered alloys, and present some results obtained by using this scheme with the LMTO-CPA(coherent potential approximation) method.
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