Realization of free-standing silicene using bilayer graphene

Abstract

The available synthesized silicene-like structures have been only realized on metallic substrates which are very different from the standalone buckled silicene, e.g. the Dirac cone of silicene is destroyed due to lattice distortion and the interaction with the substrate. Using graphene bilayer as a scaffold a novel route is proposed to synthesize silicene with electronic properties decoupled from the substrate. The buckled hexagonal arrangement of silicene between the graphene layers is found to be very similar to the theoretically predicted standalone buckled silicene which is only very weakly van der Waals coupled to the graphene layers with a graphite-like interlayer distance of 3.42\,Åand without only lattice distortion. We found that these stacked layers are stable well above room temperature.

12 pages, 3 figures

References in corpus (2)

• Electronic structure of silicon-based nanostructures
• Adsorption of Alkali, Alkaline Earth and Transition Metal Atoms on Silicene

Cited by in corpus (8)

• Electronic Structures of Hybrid Graphene/Phosphorene Nanocomposite
• Spin and valley polarization of plasmons in silicene due to external fields
• All-Metallic Vertical Transistors Based on Stacked Dirac Materials
• Vacancy tuned thermoelectric properties and high spin filtering performance in graphene/silicene heterostructures
• Scanning tunneling microscopy and Raman evidences of silicene nanosheets intercalated into graphite surface at room temperature
• Electronic properties of silicene in BN/silicene van der Waals heterostructures
• Protected edge states in silicene antidots and dots in magnetic field
• Electrically tunable magnetoplasmons in a monolayer of silicene or germanene