Coalescence of the Fermi-surface-related diffuse intensity peaks in disordered alloys

Details Coalescence of the Fermi-surface-related diffuse intensity peaks in disordered alloys Coalescence of the Fermi-surface-related diffuse intensity peaks in disordered alloys

1998-03-06

arxiv.org/abs/cond-mat/9803077v1

Phil. Mag. Lett. 78, No. 5, 403-410 (1998)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 3 EPS figures, RevTeX, submitted to Philosophical Magazine Letters

Scientific paper

10.1080/095008398177805

The possibility of disappearance of the diffuse-intensity peak splitting induced by the Fermi surface (i.e., of coalescence of the intensity maxima) 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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