For instance, the transition rate in the zero-water system is 0.48 × 10 -3 m/s at 700 K, while that in the 150-water system is 5.6 × 10 -3 m/s at 700 K, an order of magnitude higher. We have also constructed distinct B/Y interface (the γ-(010) surface contacts with the δ -(010) surface), and MD simulations yielded similar results as those observed at the B/Y interface (supplementary material, Fig. ).