Fabrication of large-scale graphene/2D-germanium heterostructure by intercalation

Guo Hui¹, Wang Xueyan¹, Bao De-Liang¹, Lu Hong-Liang¹, Zhang Yu-Yang^{1, 2}, Li Geng^{1, 2}, Wang Ye-Liang¹, Du Shi-Xuan^{1, 2, †}, Gao Hong-Jun^{1, 2}

Structure of the 2D germanium on Ir(111). (a) A LEED pattern of the 2D germanium on Ir(111). (b) A corresponding STM image with atomic resolution ( U = − 1 V and I = 20 nA). (c) Top and side views of the relaxed atomic model of a double-layer Ge on Ir(111). (d) A simulated STM image for the configuration in (c), which is in nice agreement with the STM image in (b).