Describing bond-breaking processes by reactive potentials: Importance of an environment-dependent interaction range

作者：Lars Pastewka, Pablo Jauralde Pou, Rúben Pérez, Peter Gumbsch, Michael Moseler · 发表于：Physical Review B · 年份：2008 · DOI：10.1103/physrevb.78.161402 · 被引用次数：183 · 研究领域：Machine Learning in Materials Science、Surface Chemistry and Catalysis、Electronic and Structural Properties of Oxides

First nearest-neighbor models are routinely used for atomistic modeling of covalent materials. Neighbors are usually determined by looking for atoms within a fixed interaction range. While these models provide a faithful description of material properties near equilibrium, the limited interaction range introduces problems in heterogeneous environments and when bond-breaking processes are of concern. We demonstrate in this Rapid Communication that the reliability of reactive bond-order potentials is substantially improved by using an environment-dependent first nearest-neighbor definition.