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research papers
The formalism for the modification of the pair interaction energy between the atoms of a binary alloy due to the electron-ion interaction as modified by the electron–electron interaction, is developed to lowest order. In a manner analogous to the treatment of Krivoglaz it is shown how the fluctuation-dependent part of the alloy pair energy contains a contribution from (q), the dielectric function for the alloy, which in turn reflects singularities at (2kF), where kF is the Fermi wavevector. The strength of these singularities and their contribution to the diffuse scattering of radiation is discussed and recent experimental observations of several groups on `imaging' the Fermi surface in this manner are presented.