(color online) (a) Initial structure of Al₅₀Pb₅₀ alloy at 2000 K. Al atoms are marked red and Pb atoms are marked blue. (b) Snapshots of Al₅₀Pb₅₀ alloy during the cooling process at four different cooling rates (i.e. 100, 10, 1 and 0.1 K/ps). (c) The interface length between the Al-rich domains and the Pb-rich domains during different cooling processes. The interface length is roughly estimated by the number of interface atoms.