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Classical molecular-dynamics simulations were carried out to study epitaxial growth of graphene on 6H-SiC(0001) substrate. It was found that there exists a threshold annealing temperature above which we observe formation of graphitic…

Mesoscale and Nanoscale Physics · Physics 2012-02-23 N. Jakse , R. Arifin , S. K. Lai

The early stages of epitaxial graphene layer growth on the Si-terminated 6H-SiC(0001) are investigated by Auger electron spectroscopy (AES) and depolarized Raman spectroscopy. The selection of the depolarized component of the scattered…

Materials Science · Physics 2008-11-20 Nicola Ferralis , Roya Maboudian , Carlo Carraro

Density functional theory has been employed to study graphene on the (111), (100) and (110) surfaces of silicon (Si) substrates. There are several interesting findings. First, carbon atoms in graphene form covalent bonds with Si atoms, when…

Materials Science · Physics 2021-07-14 Y. W. Sun , D. Holec , D. Gehringer , L. Li , O. Fenwick , D. J. Dunstan , C. J. Humphreys

We demonstrate molecular beam growth of graphene on biotite mica substrates at temperatures below 1000{\deg}C. As indicated by optical and atomic force microscopy, evaporation of carbon from a high purity solid-state source onto biotite…

Mesoscale and Nanoscale Physics · Physics 2016-10-26 Gunther Lippert , Jarek Dabrowski , Yuji Yamamoto , Felix Herziger , Janina Maultzsch , Max C. Lemme , Wolfgang Mehr , Grzegorz Lupina

Using high temperature annealing conditions with a graphite cap covering the C-face of an 8deg off-axis 4H-SiC sample, large and homogeneous single epitaxial graphene layers have been grown. Raman spectroscopy shows evidence of the almost…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 N. Camara , B. Jouault , A. Caboni , B. Jabakhanji , W. Desrat , E. Pausas , C. Consejo , N. Mestres , P. Godignon , J. Camassel

Top-gated, few-layer graphene field-effect transistors (FETs) fabricated on thermally-decomposed semi-insulating 4H-SiC substrates are demonstrated. Physical vapor deposited SiO2 is used as the gate dielectric. A two-dimensional hexagonal…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Y. Q. Wu , P. D. Ye , M. A. Capano , Y. Xuan , Y. Sui , M. Qi , J. A. Cooper

Graphene, the two-dimensional form of carbon presents outstanding electronic and transport properties. This gives hope for the development of applications in nanoelectronics. However, for industrial purpose, graphene has to be supported by…

Materials Science · Physics 2015-05-13 L. Magaud , F. Hiebel , F. Varchon , P. Mallet , J. -Y. Veuillen

The development of graphene electronics requires the integration of graphene devices with Si-CMOS technology. Most strategies involve the transfer of graphene sheets onto silicon, with the inherent difficulties of clean transfer and…

In this study the growth process of epitaxial graphene on SiC was investigated systematically. The transition from the initial buffer layer growth to the formation of the first monolayer graphene domains was investigated by various…

Graphene is generally considered to be a strong candidate to succeed silicon as an electronic material. However, to date, it actually has not yet demonstrated capabilities that exceed standard semiconducting materials. Currently…

Mesoscale and Nanoscale Physics · Physics 2015-06-04 Yike Hu , Ming Ruan , Zelei Guo , Rui Dong , James Palmer , John Hankinson , Claire Berger , Walt A. de Heer

As a viable candidate for an all-carbon post-CMOS electronics revolution, epitaxial graphene has attracted significant attention. To realize its application potential, reliable methods for fabricating large-area single-crystalline graphene…

We investigate the growth of the graphene buffer layer and the involved step bunching behavior of the silicon carbide substrate surface using atomic force microscopy. The formation of local buffer layer domains are identified to be the…

This letter reports the impact of surface morphology on the carrier transport and RF performance of graphene FETs formed on epitaxial graphene films synthesized on SiC substrates. Such graphene exhibits long terrace structures with widths…

A foundation of the modern technology that uses single-crystal silicon has been the growth of high-quality single-crystal Si ingots with diameters up to 12 inches or larger. For many applications of graphene, large-area high-quality…

Recently, silicene, the graphene equivalent of silicon, has attracted a lot of attention due to its compatibility with Si-based electronics. So far, silicene has been epitaxy grown on various crystalline surfaces such as Ag(110), Ag(111),…

Materials Science · Physics 2019-04-26 Dylan Nicholls , Fatima , Deniz Çakır , Nuri Oncel

Epitaxial graphene layers were grown on the C-face of 4H- and 6H-SiC using an argon-mediated growth process. Variations in growth temperature and pressure were found to dramatically affect the morphological properties of the layers. The…

We determine conditions for the formation of compressible stripes near the quantum Hall effect (QHE) edges of top-gated epitaxial graphene on Si-terminated SiC (G/SiC) and compare those to graphene exfoliated onto insulating substrate in…

Mesoscale and Nanoscale Physics · Physics 2018-02-09 Sergey Slizovskiy , Vladimir I. Fal'ko

The inability to grow large well ordered graphene with a specific number of layers on SiC(0001) is well known. The growth involves several competing processes (Si desorption, carbon diffusion, island nucleation etc.), and because of the…

Materials Science · Physics 2008-09-23 M. Hupalo , E. Conrad , M. C. Tringides

We report the growth of Si nanostructures, either as thin films or nanoparticles, on graphene substrates. The Si nanostructures are shown to be single crystalline, air stable and oxidation resistive, as indicated by the observation of a…

Materials Science · Physics 2020-06-02 Naili Yue , Joshua Myers , Liqin Su , Wentao Wang , Fude Liu , Raphael Tsu , Yan Zhuang , Yong Zhang

We report on a comparative structural characterization of two types of high quality epitaxial graphene layers grown by CVD on 4H-SiC(0001). The layers under study are a single layer graphene on top of a buffer layer and a…

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