Abstract
By simulating an interatomic pair potential obtained from the first-principles generalizedenergy-independent nonlocal model-pseudopotential (GEINMP) theory, we havereproduced the high-wavevector shoulder in the static structure factor and the recentlyobserved anomaly in the linewidth of the dynamic structure factor of liquid Ga close to themelting point. Our results indicate that the two anomalies have the same physical origin,which is associated with the Friedel oscillations induced by conduction electrons. Theanomaly in the dynamics can be well described by the revised Enskog theory forthe hard-sphere (HS) system, with the effective HS diameter determined by theposition at the first peak of the radial distribution function. We interpret theoccurrence of the anomaly in the dynamics by the physical picture of cage diffusion.
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