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Epitaxial Growth of Flat Antimonene Monolayer: A New Honeycomb Analogue of Graphene

2018; American Chemical Society; Volume: 18; Issue: 3 Linguagem: Inglês

10.1021/acs.nanolett.8b00429

1530-6992

Yan Shao, Zhongliu Liu, Cai Cheng, Xu Wu, Hang Liu, Chen Liu, Jiaou Wang, Shiyu Zhu, Yuqi Wang, Dongxia Shi, Kurash Ibrahim, Jia‐Tao Sun, Yeliang Wang, Hong‐Jun Gao,

Topological Materials and Phenomena

Group-V elemental monolayers were recently predicted to exhibit exotic physical properties such as nontrivial topological properties, or a quantum anomalous Hall effect, which would make them very suitable for applications in next-generation electronic devices. The free-standing group-V monolayer materials usually have a buckled honeycomb form, in contrast with the flat graphene monolayer. Here, we report epitaxial growth of atomically thin flat honeycomb monolayer of group-V element antimony on a Ag(111) substrate. Combined study of experiments and theoretical calculations verify the formation of a uniform and single-crystalline antimonene monolayer without atomic wrinkles, as a new honeycomb analogue of graphene monolayer. Directional bonding between adjacent Sb atoms and weak antimonene-substrate interaction are confirmed. The realization and investigation of flat antimonene honeycombs extends the scope of two-dimensional atomically-thick structures and provides a promising way to tune topological properties for future technological applications.