Ice polyamorphism in the minimal Mercedes-Benz model of water

Cartwright, J.; Piro, O.; Sánchez, P.A.; Sintes, T.
Journal of Chemical Physics 137, 244503(1-7) (2012)

We investigate ice polyamorphism in the context of the two-dimensional Mercedes-Benz model of water. We find a first-order phase transition between a crystalline phase and a high-density amorphous phase. Furthermore we find a reversible transformation between two amorphous structures of high and low density; however we find this to be a continuous and not an abrupt transition, as the low-density amorphous phase does not show structural stability. We discuss the origin of this behavior and its implications with regard to the minimal generic modeling of polyamorphism.

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