Getting through the nature of silicene: sp2-sp3 two-dimensional silicon nanosheet

By combining experimental techniques with ab-initio density functional theory calculations, we describe the Si/Ag(111) two-dimensional system in terms of a sp2-sp3 crystalline form of silicon characterized by a vertically distorted honeycomb lattice. We show that 2D sp2-sp3 Si NSs are qualified by a...

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Bibliographic Details
Published in:arXiv.org 2013-05
Main Authors: Cinquanta, E, Scalise, E, Chiappe, D, Grazianetti, C, van den Broek, B, Houssa, M, Fanciulli, M, Molle, A
Format: Article
Language:English
Subjects:
Density functional theory
Distortion
Graphene
Honeycomb construction
Metalloids
Nanosheets
Silicene
Silicon
Silver
Superstructures
Two dimensional materials
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Summary:By combining experimental techniques with ab-initio density functional theory calculations, we describe the Si/Ag(111) two-dimensional system in terms of a sp2-sp3 crystalline form of silicon characterized by a vertically distorted honeycomb lattice. We show that 2D sp2-sp3 Si NSs are qualified by a prevailing Raman peak which can be assigned to a graphene-like E2g vibrational mode and that highly distorted superstructures are semiconductive whereas low distorted ones behave as semimetals.
ISSN:2331-8422
DOI:10.48550/arxiv.1212.5422