Stabilization of silicene and preservation of its structural and electronic properties are essential for its processing and future integration into devices. The stacking of silicene on stanene, creating a Xene-based...
Stanene is one of
the most intriguing two-dimensional (2D) materials
because of its nontrivial topological properties. Here, the optical
properties from THz to UV of molecular beam deposited tin nanosheets
on Al
2
O
3
(0001) are reported. The experimental
absorption coefficient cannot be described in terms of metallic tin
or tin oxides. Nonetheless, a similar optical behavior was predicted
by theory for freestanding stanene, thus suggesting the formation
of the 2D tin nanosheets with stanene-like properties. These findings
show that 2D tin bears appealing optical properties in a broad range
of the electromagnetic spectrum, thus paving the way to Xenes-based
nanophotonics.
Epitaxy of silicene-on-Ag(111) renewed considerable interest in silicon (Si) when scaled down to the two-dimensional (2D) limit. This remains one of the most explored growth case in the emerging 2D...
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