Collective density excitations in liquid aluminium

Tankeshwar, K. ; Dubey, G. S. ; Pathak, K. N. (1988) Collective density excitations in liquid aluminium Journal of Physics: Condensed Matter, 21 (22). L811-L814. ISSN 0953-8984

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Using a simple sech(at) form of the relaxation kernel in the Mori-Zwanzig scheme, the authors calculate the dynamical structure factor S(q, omega ) of liquid aluminium. Their calculation predicts a collective excitation peak in S(q omega ) for q < or=1.2AA−1 and a plateau for 1.5 < or=q < or=1.8 AA−1, in agreement with molecular dynamics data. An overall very satisfactory agreement with the MD data of Ebbsjo and co-workers (1980) has been achieved for all wavenumbers.

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