title: Ice polyamorphism in the minimal Mercedes-Benz model of water.
abstract: 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.
authors.affiliation: Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, E-18071 Granada, Spain. julyan.cartwright@csic.es
authors.forename: Julyan H E
authors.initials: JH
authors.lastname: Cartwright
authors.forename: Oreste
authors.initials: O
authors.lastname: Piro
authors.forename: Pedro A
authors.initials: PA
authors.lastname: Sánchez
authors.forename: Tomás
authors.initials: T
authors.lastname: Sintes