Fig. 2. The differential charge density plots at the interfaces. (a) G–Sc, (b) G–Ni (top site), (c) G–Co (top site), (d) G–Ti, (e) GY–Ti, (f) G–Ni (bridge site), (g) G–Co (bridge site) and (h) GY–Cu. The yellow/blue colours mark an increase/decrease of the charge density, respectively.