Abstract EN:

Graphene, the first purely bidimensionnal crystal to be obtained holds unique electronic properties thanks to its "Dirac cones" band structure. Beyond the possible modifications of its intrinsic properties, it is now crucial to study its interactions with a diverse set of environments to create new applications: molecules functionnalization, as a substrate for molecules or metal adatoms, chemical or structural defect engineering or crafting of multilayered new materials such as van der Waals heterostructures.From a fundamental point of view, graphene synthesised on silicon carbide (SiC) is ideal. It provides a subtrate suited for scanning tunneling microscopy (STM) and physical deposition of metals as its synthesis takes place under vacuum through the evaporation of silicon.We studied the Gr/SiC(000-1) (carbon-rich face) at the local scale using STM and tunnel spectroscopy (STS) to analyse on one hand the effect of metal deposition on the graphene as a substrate and on the other hand the effects of the same deposition before the synthesis on the creation of defects in the graphene.