Quasi-long range order and topological defects in graphene on rhenium studied by scanning tunneling microscopy
Mardi 28 février 2017 14:00
- Duree : 2 heures
Lieu : Salle des séminaires - bât A - Campus CNRS, 25 rue des martyrs - 38000 Grenoble
Orateur : Soutenance de Thèse d'Alexandre ARTAUD (CEA/INAC et CNRS/Institut Néel)
Matter as we experience it on a daily basis exists in different phases : solid, liquid, gaseous, etc. These pha ses may be stable or metastable, and transitions between them may involve topological defects. In my thesis, I have studied the growth and structure of graphene on rhenium at the atomic scale using scanning tunneling microscopy (STM). The obtained STM images show that competing chemical reactions actually enable the formation of metastable configurations. Besides, growth constraints give rise to a graphene structure prone to topological defects. It indeed displays local and not global order, which can be identified as a so-called chaotic phase.
Contact : alexandre.artaud@neel.cnrs.fr
Discipline évènement : (Physique)
Entité organisatrice : (Institut Néel / QUEST)
Nature évènement : (Soutenance de thèse)
Site de l'évènement : Polygone scientifique
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