Journal ArticleDOI
A theoretical review on electronic, magnetic and optical properties of silicene.
Suman Chowdhury,Debnarayan Jana +1 more
TLDR
The results obtained so far from experimental and theoretical studies in understanding silicene have shown enough significant promising features to open a new direction in the silicon industry, silicon based nano-structures in spintronics and in opto-electronic devices.Abstract:
Inspired by the success of graphene, various two dimensional (2D) structures in free standing (FS) (hypothetical) form and on different substrates have been proposed recently. Silicene, a silicon counterpart of graphene, is predicted to possess massless Dirac fermions and to exhibit an experimentally accessible quantum spin Hall effect. Since the effective spin-orbit interaction is quite significant compared to graphene, buckling in silicene opens a gap of 1.55 meV at the Dirac point. This band gap can be further tailored by applying in plane stress, an external electric field, chemical functionalization and defects. In this topical theoretical review, we would like to explore the electronic, magnetic and optical properties, including Raman spectroscopy of various important derivatives of monolayer and bilayer silicene (BLS) with different adatoms (doping). The magnetic properties can be tailored by chemical functionalization, such as hydrogenation and introducing vacancy into the pristine planar silicene. Apart from some universal features of optical absorption present in all these 2D materials, the study on reflectivity modulation with doping (Al and P) concentration in silicene has indicated the emergence of some strong peaks having the robust characteristic of a doped reflective surface for both polarizations of the electromagnetic (EM) field. Besides this, attempts will be made to understand the electronic properties of silicene from some simple tight-binding Hamiltonian. We also point out the importance of shape dependence and optical anisotropy properties in silicene nanodisks and establish that a zigzag trigonal possesses the maximum magnetic moment. We also suggest future directions to be explored to make the synthesis of silicene and its various derivatives viable for verification of theoretical predictions. Although this is a fairly new route, the results obtained so far from experimental and theoretical studies in understanding silicene have shown enough significant promising features to open a new direction in the silicon industry, silicon based nano-structures in spintronics and in opto-electronic devices.read more
Citations
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Journal ArticleDOI
Electronic and optical properties of strained graphene and other strained 2D materials: a review.
TL;DR: This review presents the state of the art in strain and ripple-induced effects on the electronic and optical properties of graphene by providing the crystallographic description of mechanical deformations, as well as the diffraction pattern for different kinds of representative deformation fields.
Journal ArticleDOI
Electronic and optical properties of strained graphene and other strained 2D materials: a review
TL;DR: In this article, a review of the state of the art in strain and ripple-induced effects on the electronic and optical properties of graphene is presented, with a focus on the Raman spectrum.
Journal ArticleDOI
Recent progress on graphene-analogous 2D nanomaterials: Properties, modeling and applications
TL;DR: A comprehensive review of recent progress on the properties, modeling investigations and applications of graphene-analogous 2D nanomaterials is provided in this paper, where the main modeling techniques of ab initio calculation and molecular dynamics simulation for the theoretical study of GANOMs are introduced, followed by the detailed discussion on the critical findings for each material.
Journal ArticleDOI
Prospects of spintronics based on 2D materials
Yuan Ping Feng,Lei Shen,Ming Yang,Aizhu Wang,Minggang Zeng,Qingyun Wu,Sandhya Chintalapati,Ching-Ray Chang +7 more
TL;DR: This work focuses mainly on materials of truly 2D nature, that is, atomic crystal layers such as graphene, phosphorene, monolayer transition metal dichalcogenides, and others, but also highlight current research foci in heterostructures or interfaces.
Journal Article
Black Phosphorus Field-effect Transistors
Likai Li,Yijun Yu,Guo Jun Ye,Q. Q. Ge,Xuedong Ou,Hua Wu,Donglai Feng,Xianhui Chen,Yuanbo Zhang +8 more
TL;DR: In this paper, a few-layer black phosphorus crystals with thickness down to a few nanometres are used to construct field effect transistors for nanoelectronic devices. But the performance of these materials is limited.
References
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TL;DR: In this paper, the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations, are discussed.
Journal ArticleDOI
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Kostya S. Novoselov,A. K. Geim,Sergey V. Morozov,Da Jiang,Mikhail I. Katsnelson,Irina V. Grigorieva,S. V. Dubonos,A. A. Firsov +7 more
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Journal ArticleDOI
Topological insulators and superconductors
Xiao-Liang Qi,Shou-Cheng Zhang +1 more
TL;DR: Topological superconductors are new states of quantum matter which cannot be adiabatically connected to conventional insulators and semiconductors and are characterized by a full insulating gap in the bulk and gapless edge or surface states which are protected by time reversal symmetry.