Properties of the glass models We first investigated the local order by examining the Zn-N bonds, comparing it to the ab initio crystal and glasses: On Figure and Figure we plot the partial RDFs for Zn-N and Zn-Zn, which highlight a remarkable agreement of the MLP glass with its ab initio counterpart. To contrast the differences in the region between the first two peaks, the Zn-N PMF is shown on the same figure. The PMF of the MLP glass resembles that of a glass, with the region between the first two peaks populated, with a similar profile to the ab initio glass apart from a slightly larger free energy barrier (≃ 26 kJ/mol).