Depressions by stacking faults in nanorippled graphene on metals
| Autor: | Philippe David, Valérie Guisset, Alexandre Artaud, Estelle Mazaleyrat, Laurence Magaud, Johann Coraux, Charlène Tonnoir, Georg Daniel Förster, Florent Calvo, Georg Förster, Bruno Gilles, Claude Chapelier |
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| Přispěvatelé: | PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), LEM, UMR 104, CNRS-ONERA, Université Paris-Saclay (Laboratoire d'étude des microstructures), ONERA-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Science et Ingénierie des Matériaux et Procédés (SIMaP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Epitaxie et couches minces (EpiCM), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Systèmes hybrides de basse dimensionnalité (HYBRID), Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), Laboratoire de Transport Electronique Quantique et Supraconductivité (LaTEQS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Epitaxie et couches minces (NEEL- EpiCM), Systèmes hybrides de basse dimensionnalité (NEEL - HYBRID) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
defect
Materials science Stacking chemistry.chemical_element FOS: Physical sciences 02 engineering and technology 01 natural sciences nanoripples law.invention law Metastability 0103 physical sciences Electron beam processing General Materials Science 010306 general physics density functional theory Condensed Matter - Materials Science bond-order potential simulations Graphene Mechanical Engineering Materials Science (cond-mat.mtrl-sci) General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Isotropic etching chemistry Mechanics of Materials Chemical physics moiré [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] scanning tunneling microscopy Scanning tunneling microscope 0210 nano-technology Carbon Stacking fault |
| Zdroj: | 2D Materials 2D Materials, IOP Publishing, 2020, 7 (2), pp.025016. ⟨10.1088/2053-1583/ab6a5e⟩ 2D Materials, 2020, 7 (2), pp.025016. ⟨10.1088/2053-1583/ab6a5e⟩ |
| ISSN: | 2053-1583 |
| DOI: | 10.1088/2053-1583/ab6a5e⟩ |
| Popis: | International audience; A broad variety of defects has been observed in two-dimensional materials. Many of these defects can be created by top-down methods such as electron irradiation or chemical etching, while a few of them are created along bottom-up processes, in particular during the growth of the material, in which case avoiding their formation can be challenging. This occurs e.g. with dislocations, Stone-Wales defects, or atomic vacancies in graphene. Here we address a defect that has been observed repeatedly since 2007 in epitaxial graphene on metal surfaces like Ru(0001) and Re(0001), but whose nature has remained elusive thus far. This defect has the appearance of a vacant hill in the periodically nanorippled topography of graphene, which comes together with a moiré pattern. Based on atomistic simulations and scanning tunneling microscopy/spectroscopy measurements, we argue that such defects are topological in nature and that their core is a stacking fault patch, either in graphene, surrounded by loops of non-hexagonal carbon rings, or in the underlying metal. We discuss the possible origin of these defects in relation with recent reports of metastable polycyclic carbon molecules forming upon graphene growth. Like other defects, the vacant hills may be considered as deleterious in the perspective of producing high quality graphene. However, provided they can be organized in graphene, they might allow novel optical, spin, or electronic properties to be engineered. |
| Databáze: | OpenAIRE |
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