Theory of temperature dependence of the Fermi surface-induced splitting of the alloy diffuse-scattering intensity peak

Details Theory of temperature dependence of the Fermi surface-induced splitting of the alloy diffuse-scattering intensity peak Theory of temperature dependence of the Fermi surface-induced splitting of the alloy diffuse-scattering intensity peak

1998-01-11

arxiv.org/abs/cond-mat/9801089v1

Journal of Physics: Condensed Matter 10, No. 9 L145-L151 (1998)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 EPS figures, RevTeX, submitted to J. Phys. Condens. Matter (Letter to the Editor)

Scientific paper

10.1088/0953-8984/10/9/001

The explanation is presented for the temperature dependence of the fourfold intensity peak splitting found recently in diffuse scattering from the disordered Cu3Au alloy. The wavevector and temperature dependence of the self-energy is identified as the origin of the observed behaviour. Two approaches for the calculation of the self-energy, the high-temperature expansion and the alpha-expansion, are proposed. Applied to the Cu3Au alloy, both methods predict the increase of the splitting with temperature, in agreement with the experimental results.

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