Laterally inhomogeneous Au intercalation in epitaxial graphene on SiC(0001): a multimethod electron microscopy study

Abstract : Epitaxial graphene is of particular interest because of its tunable electronic structure. One important approach to tune the electronic properties of graphene relays on intercalating atomic species between graphene and the topmost silicon carbide layer. Here, we investigated the morphology and electronic structure of gold-intercalated epitaxial graphene using a multitechnique approach combining spectroscopic photoemission low-energy electron microscopy (SPELEEM) for chemical and structural characterization at mesoscopic length scale and with transmission electron microscopy (STEM) at the atomic level. Deposition of gold on ex situ prepared graphene on SiC(0 0 0 1) results in the partial intercalation of Au adatoms under graphene, with the formation of a buffer layer of variable thickness. Gold has also shown to aggregate in nanometer-sized clusters lying on top of the same graphene film. X-ray photo-emission electron microscopy measurements indicate that Au induces only small changes in the doping of the graphene layer, which does not develop a quasi free-standing behavior.
Type de document :
Chapitre d'ouvrage
Recent Advances in Graphene Research, 2016, 978-953-51-2639-3. 〈10.5772/64076〉
Liste complète des métadonnées

https://hal-cea.archives-ouvertes.fr/cea-01485298
Contributeur : Dominique Girard <>
Soumis le : mercredi 8 mars 2017 - 15:43:22
Dernière modification le : jeudi 18 octobre 2018 - 01:21:31

Lien texte intégral

Identifiants

Citation

C. Mathieu, Tevfik Onur Mentes, Emiliano Pallecchi, Andrea Locatelli, Gilles Patriarche, et al.. Laterally inhomogeneous Au intercalation in epitaxial graphene on SiC(0001): a multimethod electron microscopy study. Recent Advances in Graphene Research, 2016, 978-953-51-2639-3. 〈10.5772/64076〉. 〈cea-01485298〉

Partager

Métriques

Consultations de la notice

111