Title

A review on silicene - New candidate for electronics

Authors

Authors

A. Kara; H. Enriquez; A. P. Seitsonen; Lcly Voon; S. Vizzini; B. Aufray;H. Oughaddou

Comments

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Abbreviated Journal Title

Surf. Sci. Rep.

Keywords

Silicene; Silicon; Honeycomb; Epitaxial growth; Metal surfaces; Electronic structure; STM; SCANNING-TUNNELING-MICROSCOPY; SI/CU(110) SURFACE ALLOY; TRANSITION-METAL ALLOYS; X-RAY-DIFFRACTION; ATOMIC-STRUCTURE; AG(001); SURFACE; QUANTUM WIRES; GE TETRAMERS; THIN-FILMS; AES-LEED; Chemistry, Physical; Physics, Condensed Matter

Abstract

Silicene - the silicon- based counterpart of graphene - has a two dimensional structure that is responsible for the variety of potentially useful chemical and physical properties. The existence of silicene has been achieved recently owing to experiments involving epitaxial growth of silicon as stripes on Ag(001), ribbons on Ag(110), and sheets on Ag(111). The nano-ribbons observed on Ag(110) were found - by both high definition experimental scanning tunneling microscopy images and density functional theory calculations - to consist of an arched honeycomb structure. Angle resolved photo-emission experiments on these silicene nano-ribbons on Ag(110), along the direction of the ribbons, showed a band structure which is analogous to the Dirac cones of graphene. Unlike silicon surfaces, which are highly reactive to oxygen, the silicene nano-ribbons were found to be resistant to oxygen reactivity. On the theoretical side, recent extensive efforts have been deployed to understand the properties of standalone silicene sheets and nano-ribbons using both tight-binding and density functional theory calculations. Unlike graphene it is demonstrated that silicene sheets are stable only if a small buckling (0.44 angstrom) is present. The electronic properties of silicene nano-ribbons and silicene sheets were found to resemble those of graphene. Although this is a fairly new avenue, the already obtained outcome from these important first steps in understanding silicene showed promising features that could give a new future to silicon in the electronics industry, thus opening a promising route toward wide-range applications. In this review, we plan to introduce silicene by presenting the available experimental and theoretical studies performed to date, and suggest future directions to be explored to make the synthesis of silicene a viable one. (C) 2011 Elsevier B. V. All rights reserved.

Journal Title

Surface Science Reports

Volume

67

Issue/Number

1

Publication Date

1-1-2012

Document Type

Review

Language

English

First Page

1

Last Page

18

WOS Identifier

WOS:000298239100001

ISSN

0167-5729

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