Influence of the degree of decoupling of graphene on the properties of transition metal adatoms
| Autor: | T. Eelbo, Roland Wiesendanger, M. Gyamfi, M. Waśniowska, Ulrich Starke, Stiven Forti |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
FOS: Physical sciences 02 engineering and technology Epitaxy 01 natural sciences 7. Clean energy law.invention symbols.namesake Adsorption Transition metal law 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 010306 general physics Condensed Matter - Materials Science Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Graphene Scattering Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Condensed Matter Physics Electronic Optical and Magnetic Materials Dirac fermion Chemical physics symbols Scanning tunneling microscope 0210 nano-technology Graphene nanoribbons |
| Zdroj: | Physical Review B |
| ISSN: | 1098-0121 |
| DOI: | 10.1103/PhysRevB.87.205443 |
| Popis: | We investigate the adsorption sites of $3d$ transition metal (TM) adatoms by means of low-temperature scanning tunneling microscopy and spectroscopy. Co and Ni adatoms were adsorbed on two types of graphene on SiC(0001), i.e. pristine epitaxial monolayer graphene (MLG) and quasi-free-standing monolayer graphene (QFMLG). In the case of QFMLG, two stable adsorption sites are identified, while in the case of MLG, only one adsorption site is observed. Our experimental results reveal the decoupling efficiency as a crucial parameter for determining the adsorption site as well as the electronic properties of $3d$ transition metal atoms on graphene. Furthermore, we show that Co atoms adsorbed on QFMLG are strong scattering potentials for Dirac fermions and cause intervalley scattering in their vicinity. 10 pages, 4 figures |
| Databáze: | OpenAIRE |
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