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Title: Realization of free-standing silicene using bilayer graphene

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 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 Å and without any lattice distortion. We found that these stacked layers are stable well above room temperature.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1]
  1. Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen (Belgium)
  2. (Iran, Islamic Republic of)
  3. Department of Physics, Basel University, Klingelbergestrasse 82, CH-4056 Basel (Switzerland)
Publication Date:
OSTI Identifier:
22253206
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; GRAPHENE; GRAPHITE; LAYERS; SUBSTRATES; TEMPERATURE RANGE 0273-0400 K; VAN DER WAALS FORCES