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

Abstract

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.

References in corpus (4)

• Evidence of silicene in honeycomb structures of silicon on Ag(111)
• Electrically Tunable Band Gap in Silicene
• Electronic structure of silicon-based nanostructures
• Topological Insulator and Helical Zero Mode in Silicene under Inhomogeneous Electric Field

Cited by in corpus (13)

• Tuning the Band Gap in Silicene by Oxidation
• Electron-Phonon Coupling in Two-Dimensional Silicene and Germanene
• Investigation of Electron-Phonon Coupling in Epitaxial Silicene by In-situ Raman Spectroscopy
• Introduction to the Physics of Silicene and other 2D Materials
• Electrostatic quantum dots in silicene
• Growth of Thin Oxidation-Resistive Crystalline Si Nanostructures on Graphene
• Point defect formation energies in graphene from diffusion quantum Monte Carlo and density functional theory
• A comprehensive analysis of the (R13xR13)R13.9° type II structure of silicene on Ag(111)
• Effect of an external electric field on local magnetic moments in silicene
• Metal-Silicene Interaction Studied by Scanning Tunneling Microscopy
• Electrical control of a confined electron spin in a silicene quantum dot
• Large magnetoresistance dips and perfect spin-valley filter induced by topological phase transitions in silicene
• Nearly pure spin-valley sideband tunneling in silicene: effect of interplay of time periodic potential barrier and spin-valley-dependent Dirac mass