Silicalike sequence of anomalies in core-softened systems

Abstract

We present a simulation study of density, structural, and diffusion anomalies in a core-softened system, a remarkable model liquid that exhibits anomalous properties seen in tetrahedral liquids such as silica and water. It is widely believed that core-softened potentials demonstrate waterlike sequence of anomalies. Here, we show that the order of the region of anomalous diffusion and the regions of density and structural anomalies are inverted with increasing depth of the attractive part of the potential and have silicalike sequence. We also show that the Widom line slope is negative as in water.