Electronic structure of monolayer graphite on some transition metal carbide surfaces

Nagashima, A.; Nuka, Kenji; Satoh, Katsuhiko; Itoh, Hiroshi; Ichinokawa, T.; Oshima, C.; Otani, Shigeki

doi:10.1016/0167-2584(93)90501-9

Cited by 6 publications

(7 citation statements)

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“…[23] made a suggestion about its origin as a result of purely kinematic effect. Opposed to a single peak of the π plasmon observed in the EELS spectrum (q ≈ 0 Å−1 ) of graphite or freestanding graphene the double-peak structure in the region of 0 − 10 eV was previously observed in the graphite intercalated compounds (GIC's) [31][32][33], in alkali-metal and in FeCl 3 intercalated SWCNTs [34,35], and in the graphene/TiC(111) system [36]. The latter system seems to be a similar to the studied here, the graphene/Ni(111) system, with the metal atoms (Ti or Ni) being in the direct contact with the carbon atoms of the graphene layer and because of a similarity for the π band structure of graphene extracted from the ARPES measurements for both systems.…”

Section: Eels Spectra For Ni(111) and Graphene/ni(111) At Different E Pmentioning

confidence: 74%

EELS study of the epitaxial graphene/Ni(1 1 1) and graphene/Au/Ni(1 1 1) systems

Generalov

Dedkov

2012

Carbon

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We have performed electron energy-loss spectroscopy (EELS) studies of Ni(111), graphene/Ni(111), and the graphene/Au/Ni(111) intercalation-like system at different primary electron energies. A reduced parabolic dispersion of the π plasmon excitation for the graphene/Ni(111) system is observed compared to that for bulk pristine and intercalated graphite and to linear for free graphene, reflecting the strong changes in the electronic structure of graphene on Ni(111) relative to free-standing graphene. We have also found that intercalation of gold underneath a graphene layer on Ni(111) leads to the disappearance of the EELS spectral features which are characteristic of the graphene/Ni(111) interface. At the same time the shift of the π plasmon to the lower loss-energies is observed, indicating the transition of initial system of strongly bonded graphene on Ni(111) to a quasi free-standing-like graphene state.

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Section: Eels Spectra For Ni(111) and Graphene/ni(111) At Different E Pmentioning

confidence: 74%

EELS study of the epitaxial graphene/Ni(1 1 1) and graphene/Au/Ni(1 1 1) systems

Generalov

Dedkov

2012

Carbon

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“…However, some metallic substrates, such as Ni(111)11 interact strongly with graphene and distort the Dirac cone12, whereas for Pt(111)13, for example, the interaction is weaker. The small distance (2.1 Å) realized between graphene and Ni(111) results in significant hybridization of the Ni 3d and C 2p orbitals, which explains the strong modification of the band structure1415. It has been shown experimentally16 and theoretically17 that C magnetic moments are induced.…”

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confidence: 99%

Quasi-freestanding graphene on Ni(111) by Cs intercalation

Alattas

Schwingenschlögl

2016

Sci Rep

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A possible approach to achieve quasi-freestanding graphene on a substrate for technological purpose is the intercalation of alkali metal atoms. Cs intercalation between graphene and Ni(111) therefore is investigated using density functional theory, incorporating van der Waals corrections. It is known that direct contact between graphene and Ni(111) perturbs the Dirac states. We find that Cs intercalation restores the linear dispersion characteristic of Dirac fermions, which agrees with experiments, but the Dirac cone is shifted to lower energy, i.e., the graphene sheet is n-doped. Cs intercalation therefore decouples the graphene sheet from the substrate except for a charge transfer. On the other hand, the spin polarization of Ni(111) does not extend through the intercalated atoms to the graphene sheet, for which we find virtually spin-degeneracy.

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“…5(a)]. 40 Graphene coatings were observed on most of the TiC grains, but not on b-SiC grains. This suggests that the lattice structure of b-SiC requires more energy for the carbon atoms to attach.…”

Section: Resultsmentioning

confidence: 95%

“…No such weakening effects and direct bonding are observed on other planes of TiC, as indicated by the much less well‐ordered graphene observed when it attaches to other crystal facets, such as (110) and (100) [see Fig. (a)] . Graphene coatings were observed on most of the TiC grains, but not on β‐SiC grains.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Mesoporous Carbon‐Bonded TiC/SiC Composites by Direct Carbothermal Reduction of Sol–Gel Derived Monolithic Precursor

et al. 2011

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Mesosporous carbon‐bonded titanium‐carbide/silicon‐carbide (C‐TiC/SiC) ceramics with a high specific surface area (221 m2/g), ultra fine grains (10–50 nm), and high crystallinity were synthesized from direct carbothermal reduction (1100°–1450°C) of monolithic Ti–Si–O–C precursors made from controlled sol–gel process. The nano‐sized carbide grains are bonded into bulk materials by poly(furfuryl alcohol) (PFA) derived nanocrystalline carbon framework by “bridge,” “entanglement,” and “adhesive” effects. Graphenes were found to grow on {111} planes of TiC grains but this was not observed for SiC. The bonding of graphitic carbon layers on carbide grains support the nanostructure and also result in the desired combination of functional and mechanical properties.

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Electronic structure of monolayer graphite on some transition metal carbide surfaces

Cited by 6 publications

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EELS study of the epitaxial graphene/Ni(1 1 1) and graphene/Au/Ni(1 1 1) systems

EELS study of the epitaxial graphene/Ni(1 1 1) and graphene/Au/Ni(1 1 1) systems

Quasi-freestanding graphene on Ni(111) by Cs intercalation

Synthesis of Mesoporous Carbon‐Bonded TiC/SiC Composites by Direct Carbothermal Reduction of Sol–Gel Derived Monolithic Precursor

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