If you are not the author of this article and you wish to reproduce material from If you are the author of this article you still need to obtain permission to reproduce This article reviews the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. graphene is relatively straightforward to make, but not so easy to find. Please enable JavaScript A traditional 2DEG in a quantum well or heterostructure tends to have an effective thickness around 5–50 nm. Corresponding authors, a (4) Graphene is much thinner than a traditional 2D electron gas (2DEG). The electronic propertiesofgraphenewererecentlydiscussedin an extensive theory review (3), and this basic in- formation is unlikely to require any revision soon. This is due to the constraints on construction and the fact that the confined electron wavefunctions … Tel: +918022082839, b The sp2 hybridization between one s orbital and two p orbitals leads to a trigonal planar structure with a formation of aecules consisting of wrapped graphene by the introduction of bond between carbon The Dirac electrons behave in unusual ways in tunneling, confinement, and the integer … Fax: +918022082767 This effect results from the covalent bonding between C and surface Si atoms, modifying the π-orbital network of the graphene layer. sudipta250@gmail.com, pati@jncasr.ac.in Two different edge geometries, namely zigzag and armchair, arising from the finite termination of graphene, control the electronic properties of graphene nanoribbons. * The Si(100)/H surface does not perturb graphene's electronic properties, whereas the interaction between it and the clean Si(100) surface changes its electronic states significantly. article provided that the correct acknowledgement is given with the reproduced material. Recent experimental sophistications provide various physical and chemical ways to materialize these systems. The electronic properties of graphene are significantly influenced by the supporting substrate. For reproduction of material from all other RSC journals and books: For reproduction of material from all other RSC journals. The Dirac electrons can be controlled by application of external electric and magnetic fields, or by altering sample geometry and/or topology. It is extremely sensitive to the structure of the system; in particular, of the whole article in a thesis or dissertation. Low-dimensional materials are of great interest to both theorists and experimentalists, owing to their novel electronic properties which arise mainly because of a host of quantum confinement effects. If you are the author of this article you do not need to formally request permission formally request permission using Copyright Clearance Center. Recent experimental findings of graphene have provided a new platform to explore the interesting electronic properties in strictly two dimensions. to access the full features of the site or access our, Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Campus, Bangalore, India, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Campus, Bangalore, India, Instructions for using Copyright Clearance Center page. This article reviews the basic theoretical aspects of graphene, a one-atom-thick allotrope of carbon, with unusual two-dimensional Dirac-like electronic excitations. New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Campus, Bangalore, India. "Reproduced from" can be substituted with "Adapted from". This may take some time to load. Information about reproducing material from RSC articles with different licences or in a thesis or dissertation provided that the correct acknowledgement is given do not need to formally request permission to reproduce material contained in this You do not have JavaScript enabled. The Dirac electrons behave in unusual ways in tunneling, confinement, and the integer … Low-dimensional materials are of great interest to both theorists and experimentalists, owing to their novel electronic properties which arise mainly because of a host of quantum confinement effects. Fetching data from CrossRef. XX is the XXth reference in the list of references. Go to our Instructions for using Copyright Clearance Center page for details. In this feature article, we review the novel properties of an interesting class of quasi one dimensional materials, known as graphene nanoribbons, which can be obtained by finite termination of graphene sheet with smooth edges. Authors contributing to RSC publications (journal articles, books or book chapters) The local density of states shows that the bonded C and Si surface states are highly disturbed near the … is available on our Permission Requests page. The Dirac electrons can be controlled by application of external electric and magnetic fields, or by altering sample geometry and/or topology. The structural flexibility of graphene is reflected in its electronic properties. In all cases the Ref. One of the most remarkable properties of graphene is the anomalous quantum Hall effect. to reproduce figures, diagrams etc. Theoretical Sciences Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur Campus, Bangalore, India 1). The origin of the optical properties of graphene is discussed with regard to its peculiar band structure and the massless relativistic nature of its charge carriers. it in a third party non-RSC publication you must This gives rise to a number of unusual physical properties of this system distinguishing it from conventional two-dimensional metals. the whole article in a third party publication with the exception of reproduction Reproduced material should be attributed as follows: If the material has been adapted instead of reproduced from the original RSC publication E-mail: Here we attempt to give an overview of their interesting electronic, magnetic, optical, conduction properties and explore possible ways of enhancing their device applicability by a number of ways including external perturbations, doping and chemical modifications. contained in this article in third party publications with the reproduced material. The key feature of graphene is the massless Dirac type of low-energy electron excitations (Fig. Many of the impressive physical and electronic properties of graphene can be considered to be consequences of this fact. Recent experimental findings of graphene have provided a new platform to explore the interesting electronic properties in strictly two dimensions.

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