Epitaxial Graphene on Metals

Dedkov, Yuriy; Horn, Karsten; Preobrajenski, Alexei; Fonin, Mikhail

doi:10.1007/978-3-642-22984-8_7

Cited by 10 publications

(14 citation statements)

References 148 publications

(223 reference statements)

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“…One of the most prominent examples in this regard addresses the nature of bonding at the graphene/metal interface, the problem, which was discussed in a large series of publications (see, e.g., Refs. ), having the question open for a long time –how a relatively weak interaction (in the order of 50–150 meV/C‐atom) can lead to strong modifications in the electronic structure of graphene? Only recently this problem was considered in a complex approach and the universal model, describing the interaction in the whole graphene/metal interface family, was proposed ().…”

Section: Introductionmentioning

confidence: 99%

Scanning probe microscopy and spectroscopy of graphene on metals

Dedkov¹,

Voloshina

Fonin

2015

Physica Status Solidi (b)

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Graphene, a two-dimensional (2D) material with unique electronic properties, appears to be an ideal object for the application of surface-science methods. Among them, a family of scanning probe microscopy methods (STM, AFM, KPFM) and the corresponding spectroscopy add-ons provide information about the structure and electronic properties of graphene on the local scale (from inline imagem to atoms). This review focuses on the recent applications of these microscopic/spectroscopic methods for the investigation of graphene on metals (interfaces, intercalation-like systems, graphene nanoribbons, and quantum dots, etc.). It is shown that very important information about interaction strength at the graphene/metal interfaces as well as about modification of the electronic spectrum of graphene at the Fermi level can be obtained on the local scale. The combination of these results with those obtained by other methods and comparison with recent theoretical data demonstrate the power of this approach for the investigation of the graphene-based systems.Comment: Feature Article in pss (b

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Section: Introductionmentioning

confidence: 99%

Scanning probe microscopy and spectroscopy of graphene on metals

Dedkov¹,

Voloshina

Fonin

2015

Physica Status Solidi (b)

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“…First, these surfaces are ideal templates for the growth of high quality films, and their use in this context is seen as a pathway towards mass production of large scale transferable graphene [1,2]. More importantly, from a point of view of the basic physical properties and applications, the ferromagnetic substrates such as Ni(111) and Co(0001) are interesting, since they induce the magnetic polarization in graphene [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Electronic structure and magnetic properties of cobalt intercalated in graphene on Ir(111)

et al. 2014

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Using a combination of photoemission and x-ray magnetic circular dichroism (XMCD), we characterize the growth and the electronic as well as magnetic structure of cobalt layers intercalated in between graphene and Ir(111). We demonstrate that magnetic ordering exists beyond one monolayer intercalation, and determine the Co orbital and spin magnetic moments. XMCD from the carbon edge shows an induced magnetic moment in the graphene layer, oriented antiparallel to that of cobalt. The XMCD experimental data are discussed in comparison to our results of first-principles electronic structure calculations. It is shown that good agreement between theory and experiment for the Co magnetic moments can be achieved when the local-spin-density approximation plus the Hubbard U (LSDA + U ) is used.

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“…In most of these devices, the graphene-metal interfaces are utilized as a contact for charge or spin injection. Hence the crystallographic and electronic properties of such interface determine the charge/spin injection efficiency of the corresponding contact, which is one of the main motivations for studies of the graphene-metal interface [3][4][5].From another, more fundamental point of view, the study of the bonding mechanism at the graphene-metal interface is a very interesting problem in itself, and up to now such systems are far from the being fully understood [6]. Several factors influence the electronic properties of the graphene-metal interface: charge transfer from/onto graphene-derived π states, hybridization of the electronic valence band states of graphene and the metal, and the lattice match between the graphene and metal surface.…”

mentioning

confidence: 99%

Understanding the origin of band gap formation in graphene on metals: graphene on Cu/Ir(111)

Vita

Böttcher

Horn

et al. 2014

Sci Rep

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Understanding the nature of the interaction at the graphene/metal interfaces is the basis for graphene-based electron- and spin-transport devices. Here we investigate the hybridization between graphene- and metal-derived electronic states by studying the changes induced through intercalation of a pseudomorphic monolayer of Cu in between graphene and Ir(111), using scanning tunnelling microscopy and photoelectron spectroscopy in combination with density functional theory calculations. We observe the modifications in the band structure by the intercalation process and its concomitant changes in the charge distribution at the interface. Through a state-selective analysis of band hybridization, we are able to determine their contributions to the valence band of graphene giving rise to the gap opening. Our methodology reveals the mechanisms that are responsible for the modification of the electronic structure of graphene at the Dirac point, and permits to predict the electronic structure of other graphene-metal interfaces.

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Epitaxial Graphene on Metals

Cited by 10 publications

References 148 publications

Scanning probe microscopy and spectroscopy of graphene on metals

Scanning probe microscopy and spectroscopy of graphene on metals

Electronic structure and magnetic properties of cobalt intercalated in graphene on Ir(111)

Understanding the origin of band gap formation in graphene on metals: graphene on Cu/Ir(111)

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