Erratum: Effect of preparation on the commensurabilities and thermal expansion of graphene on Ir(111) between 10 and 1300 K [Phys. Rev. B<b>88</b>, 165406 (2013)]

Jean, Fabien; Zhou, Tao; Blanc, Nils; Felici, Roberto; Coraux, Johann; Renaud, Gilles

doi:10.1103/physrevb.90.239901

Cited by 8 publications

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“…Moreover, the undulation could also be affected by the growth methods (full/partial growth, chemical vapor deposition, temperature programmed growth...) and growth temperature as it has been reported that these parameters affect the graphene lattice parameter and its commensurability with the substrate. 15,19 The iridium undulations are also found larger than those deduced from a LEED study. 11 This might be due to some limitation of LEED to analyse layers below the graphene one, because of the small electron mean free path.…”

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confidence: 61%

“…18, yet the temperatures which we chose for each step are different, actually identical to those used for preparing one of the samples addressed in Ref. 15. We note that both the graphene coverage and growth temperature have been argued to influence the structure of graphene, 8,19 and thus its properties.…”

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confidence: 99%

“…It was reported previously that this system cannot be consider fully commensurate, as it is really a composition of commensurate domains with incommensurate boundaries 19 and that the thermal history of the sample effects it. 15,19 Here, the 9.03 ratio indicates that there should be a combinaison of (1010)/(99), (2121)/(1919) and incommensurate domains. However, despite the complexity of the sample, the starting hypothesis of the problem allows to extract a good approximation of the actual structure.…”

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confidence: 99%

“…15 allowing for considerably reducing the concentration of residual carbon in bulk Ir(111). Graphene was grown in two steps, first by 1473 K annealing of a room-temperatureadsorbed monolayer of ethylene, second by exposure to 10 −8 mbar of ethylene the surface held at 1273 K. This growth procedure allows for selecting a welldefined crystallographic orientation of purely singlelayer graphene with respect to Ir(111).…”

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confidence: 99%

“…Details on the chambers and the beam are given in Ref. 15. The non-specular crystal truncation rods (CTRs) were measured on BM32 and the specular rod, 00L, was measured by EXRR on ID03.…”

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Topography of the graphene/Ir(111) moiré studied by surface x-ray diffraction

et al. 2015

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The structure of a graphene monolayer on Ir(111) has been investigated in situ in the growth chamber by surface x-ray diffraction including the specular rod, which allows disentangling the effect of the sample roughness from that of the nanorippling of graphene and iridium along the moir-like pattern between graphene and Ir(111). Accordingly we are able to provide precise estimates of the undulation associated with this nanorippling, which is small in this weakly interacting graphene/metal system and thus proved difficult to assess in the past. The nanoripplings of graphene and iridium are found in phase, i.e. the in-plane position of their height maxima coincide, but the amplitude of the height modulation is much larger for graphene (0.379 ± 0.044Å) than, e.g., for the topmost Ir layer (0.017 ± 0.002Å). The average graphene-Ir distance is found to be 3.38 ± 0.04Å.Graphene, a monoatomic layer of carbon atoms arranged in a honeycomb lattice, has been investigated thoroughly in the past ten years because of its exceptional properties, which hold promises for numerous applications.1 Transition metal surfaces form a broad family of substrates for the growth of large area, high quality graphene.2 New properties can be induced in graphene through the interaction with the substrate, e.g. electronic bandgaps, 3 spin-polarization 4 and superconductivity.5 In most graphene-on-metal systems, the interaction is modulated at the nanoscale, due to lattice mismatch between graphene and the metal, which results in twodimensional patterns with periodicity of the order of nanometers, often referred to as "moirs", following an analogy with the beating of optical waves through two mismatched periodic lattices (e.g. tissue veils). Knowledge on the topographic properties of these moirs, i.e. the average graphene-metal distance, and the perpendicular-to-the-surface amplitude of the graphene and metal undulations across the moir, is desirable in view of characterizing the interaction and rationalizing the other properties.

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confidence: 99%

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confidence: 99%

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“…Details on the chambers and the beam are given in Ref. 15. The non-specular crystal truncation rods (CTRs) were measured on BM32 and the specular rod, 00L, was measured by EXRR on ID03.…”

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Topography of the graphene/Ir(111) moiré studied by surface x-ray diffraction

et al. 2015

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Study of Thermal Expansion Coefficient of Graphene via Raman Micro‐Spectroscopy: Revisited

Feng

Wei

et al. 2021

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2D materials have generated enormous interest because of its unique physical properties and promising applications. 2D materials such as graphene, h-BN, silicene, h-MoS 2 , and black phosphorus are expected to play a central role in nextgeneration electronic and optoelectronic devices. [1-3] The The thermal expansion coefficient (TEC) of a 2D material is a fundamental parameter for both material property and applications. A joint study is hereby reported, using Raman microspectroscopy and molecular dynamics (MD) simulations, of the substrate effects on thermal properties of graphene. It is found that besides the lateral strain induced by the substrate, out-of-plane coupling strongly affects the temperature-dependent vibrational modes and TEC of graphene. MD simulation shows significant reduction of the density of states for longer wavelength out-of-plane vibrations when the graphene is supported on an alkane substrate. The negative TEC of freestanding graphene becomes smaller when out-of-plane rippling is suppressed. In order to measure TEC of 2D materials with the out-of-plane coupling being taken into consideration, a Raman microspectroscopic scheme to separate the contributions of lateral strain and out-of-plane coupling to TEC is developed. The TEC of graphene on octadecyltrichlorosilane substrate is found to be (−0.6 ± 0.5) × 10 −6 K −1 at room temperature, which is fundamentally smaller than that of freestanding graphene. These results shed light on the fundamental understanding of the interaction between 2D material and substrate, and offer a general recipe for studying separately in-plane and out-of-plane couplings on supported materials.

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Moiré Patterns of Graphene on Metals

Günther

Zeller

2018

Encyclopedia of Interfacial Chemistry

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Erratum: Effect of preparation on the commensurabilities and thermal expansion of graphene on Ir(111) between 10 and 1300 K [Phys. Rev. B88, 165406 (2013)]

Cited by 8 publications

References 0 publications

Topography of the graphene/Ir(111) moiré studied by surface x-ray diffraction

Topography of the graphene/Ir(111) moiré studied by surface x-ray diffraction

Study of Thermal Expansion Coefficient of Graphene via Raman Micro‐Spectroscopy: Revisited

Moiré Patterns of Graphene on Metals

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