Journal
NANO LETTERS
Volume 18, Issue 3, Pages 2133-2139Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b00429
Keywords
Antimonene; two-dimensional materials; flat honeycomb lattice; epitaxial growth; STM
Categories
Funding
- National Scientific Foundation of China [61725107, 51572290, 11334006]
- National Key R&D Projects of China [2016YFA0202300]
- National Basic Research Program of China [2013CBA01600]
- Chinese Academy of Sciences [XDPB06, XDB07030100]
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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.
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