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Volumn 10, Issue 11, 2010, Pages 4335-4340

Graphene on metallic substrates: Suppression of the Kohn Anomalies in the phonon dispersion

Author keywords

chemisorption; electron phonon coupling; Graphene substrate interaction; Kohn anomaly; vibrational spectroscopy

Indexed keywords

DIFFERENT SUBSTRATES; ELECTRON PHONON; ELECTRON PHONON COUPLINGS; ELECTRON TRANSPORT; GRAPHENE SHEETS; GRAPHENES; HIGH-SYMMETRY POINTS; INTERACTION STRENGTH; KOHN ANOMALIES; METALLIC SUBSTRATE; OUT-OF-PLANE MODES; PHONON DISPERSIONS;

EID: 78449304850     PISSN: 15306984     EISSN: 15306992     Source Type: Journal    
DOI: 10.1021/nl101657v     Document Type: Article
Times cited : (114)

References (58)
  • 21
    • 78449290361 scopus 로고    scopus 로고
    • We note that for graphene on nickel, besides the well-known epitaxial growth, (13-17) also nonepitaxial growth has been observed recently, (4, 19) depending on the growth conditions
    • We note that for graphene on nickel, besides the well-known epitaxial growth, (13-17) also nonepitaxial growth has been observed recently, (4, 19) depending on the growth conditions.
  • 34
    • 78449304056 scopus 로고    scopus 로고
    • The ABINIT code results from a common project of the Université Catholique de Louvain, Corning Incorporated, and other collaborators
    • The ABINIT code results from a common project of the Université Catholique de Louvain, Corning Incorporated, and other collaborators (http://www.abinit.org).
  • 35
    • 78449283114 scopus 로고    scopus 로고
    • -1
    • -1.
  • 38
    • 78449312792 scopus 로고    scopus 로고
    • A1 ′ = 2.7. These values are in almost perfect quantitative agreement with the calculations of ref 38, which in turn compared quite favorably to Raman measurements on stretched graphene
    • A 1′ = 2.7. These values are in almost perfect quantitative agreement with the calculations of ref 38, which in turn compared quite favorably to Raman measurements on stretched graphene.
  • 43
    • 78449268053 scopus 로고    scopus 로고
    • We note, however, that the HREELS data points are often considerably scattered. For example, in the case of pure graphite the experimental gap is not completely closed (see the data of ref 41 in Figure 2) even though the closure of the gap is dictated by the symmetry of the system
    • We note, however, that the HREELS data points are often considerably scattered. For example, in the case of pure graphite the experimental gap is not completely closed (see the data of ref 41 in Figure 2) even though the closure of the gap is dictated by the symmetry of the system.
  • 44
    • 78449270539 scopus 로고    scopus 로고
    • 1/2, because in their model every atom is connected via a spring to the substrate
    • 1/2, because in their model every atom is connected via a spring to the substrate.
  • 45
    • 78449272664 scopus 로고    scopus 로고
    • 4 dyn/cm is much softer
    • 4 dyn/cm is much softer.
  • 50
    • 78449305043 scopus 로고    scopus 로고
    • To demonstrate the average effect of the graphene-substrate interaction, we have performed a spin-unpolarized calculation in the local density approximation. For the details of the spin-polarized band structure, we refer to refs 6 and 35
    • To demonstrate the average effect of the graphene-substrate interaction, we have performed a spin-unpolarized calculation in the local density approximation. For the details of the spin-polarized band structure, we refer to refs 6 and 35.
  • 51
    • 78449299407 scopus 로고    scopus 로고
    • The result is similar to the phonon dispersion of pure graphene when calculated under neglect of the EPC with the π bands (Figure 1 of ref 45)
    • The result is similar to the phonon dispersion of pure graphene when calculated under neglect of the EPC with the π bands (Figure 1 of ref 45).
  • 52
    • 78449307183 scopus 로고    scopus 로고
    • We start at the (LDA) equilibrium value of 2.02 Å and increase the binding distance in steps of 0.2 Å. Since this no longer corresponds to the equilibrium geometry, we assume a planar graphene sheet and calculate only the in-plane modes
    • We start at the (LDA) equilibrium value of 2.02 Å and increase the binding distance in steps of 0.2 Å. Since this no longer corresponds to the equilibrium geometry, we assume a planar graphene sheet and calculate only the in-plane modes.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.