Coalescence of the Fermi-surface-related diffuse-intensity peaks in disordered alloys |
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Authors: | Igor Tsatskis |
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Abstract: | The theoretical possibility of the disappearance of the diffuse-intensity peak splitting induced by the Fermi surface in disordered alloys with decreasing temperature is predicted. The underlying mechanism is the compensation of the reciprocal-space curvatures of the self-energy and the interaction. The theory also describes similar results obtained earlier for two low-dimensional models with competing interactions. The coalescence is compared with the recently observed 'thermal' splitting in Pt-V which can be explained in the same way. |
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