Abstract
We have investigated the electronic states of some Pt-W alloys by means of the relativistic KKR-CPA theory in order to gain some insights on the many interesting physical properties of such a system. In particular we were interested in studying the role of the Fermi surface topology in the ordering phenomena shown by this alloy. It turns out that the broadening of the states at the Fermi energy makes the Fermi surface concept questionable. Reasons for that are understood in terms of our scheme and approximations, even though to give an exhaustive answer one should pursue the full-charge self-consistency obtainable in the SCF-KKR-CPA theory.
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