Growth, morphology and electronic properties of epitaxial graphene on vicinal Ir(332) surface
| Autor: | François Nicolas, Daniel Malterre, Antonio Tejeda, A. Taleb-Ibrahimi, Stefan Kubsky, Arlensiú Celis, Muriel Sicot, Maya N. Nair |
|---|---|
| Přispěvatelé: | Laboratoire de Physique des Solides (LPS), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), City University of New York [New York] (CUNY), Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Band gap Photoemission spectroscopy Superlattice growth photoelectron spectroscopy Bioengineering Angle-resolved photoemission spectroscopy 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention law General Materials Science Electrical and Electronic Engineering Electronic band structure ComputingMilieux_MISCELLANEOUS Low-energy electron diffraction business.industry Graphene superperiodicity Mechanical Engineering General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences bandgap Mechanics of Materials electronic properties [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Optoelectronics 0210 nano-technology business Vicinal |
| Zdroj: | Nanotechnology Nanotechnology, Institute of Physics, 2020, 31 (28), pp.285601. ⟨10.1088/1361-6528/ab866a⟩ |
| ISSN: | 0957-4484 1361-6528 |
| DOI: | 10.1088/1361-6528/ab866a⟩ |
| Popis: | International audience; Superlattice induced minigaps in graphene band structure due to underlying one-dimensional nanostructuration has been demonstrated. A superperiodic potential can be introduced in graphene if the substrate is periodically structured. The successful preparation of a periodically nanostructured substrate in large scale can be obtained by carefully studying the electronic structure with a spatial averaging technique such as high-energy resolution photoemission. In this work, we present two different growth methods such as temperature programmed growth (TPG) and chemical vapor deposition (CVD) studied by scanning tunnelling microscopy (STM) and low energy electron diffraction (LEED). In both methods, we show that the original steps of Ir(332) have modified with (111) terraces and step bunching after graphene growth. Graphene grows continuously over the terrace and the step bunching areas. We observe that while TPG growth does not give rise to a well-defined surface periodicity required for opening a bandgap, the CVD growth does. By combining with angle-resolved photoemission spectroscopy (ARPES) measurements, we correlate the obtained spatial periodicity to observed band gap opening in graphene. |
| Databáze: | OpenAIRE |
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