Phase stability at interfaces (dataset)

Abstract

This is the dataset associated with the article "Predicting phase stability at interfaces".

We present the RAFFLE methodology for structural prediction of the interface between two materials and demonstrate its effectiveness by applying it to MgO encapsulated by two layers of graphene. To address the challenge of interface structure prediction, our methodology combines physical insights derived from morphological features observed in related systems with an iterative machine learning technique. This employs physical-based methods, including void-filling and n-body distribution functions to predict interface structures. For the carbon-MgO encapsulated system, we have shown the rocksalt and hexagonal phases of MgO to be the two most energetically stable in the few-layer regime. We demonstrate that monolayer rocksalt is heavily stabilised by interfacing with graphene, becoming more energetically favourable than the graphene-like monolayer hexagonal MgO. The RAFFLE methodology provides valuable insights into interface behaviour, and a route to finding new materials at interfaces.