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Electronic structure of 2D materials and van der Waals heterostructures probed at the nanoscale - Pierre Mallet

Institut NEEL, CNRS & Université Grenoble Alpes, Grenoble


(LPS – Amphithéâtre moyen)

Graphene and related two-dimensional transition metal dichalcogenides (2D-TMDs) have attracted a lot of attention in the recent years. Similar to graphene, 2D-TMDs correspond to a single layer of a bulk compound held by interlayer van der Waals interactions. However, unlike graphene, numerous 2D-TMDs have a sizeable electronic bandgap, direct in most cases, of considerable importance for the development of (opto)-electronic devices. A general and relevant topic for mastering devices based on these materials relies on the understanding of the impact of disorder (impurities, edges) and of the sustaining medium on the electronic properties of the system. New properties can also arise from depositing chosen atomic species onto the surface. In order to address these fundamental issues, we use a scanning tunneling microscope working at low temperature in ultra-high vacuum conditions, which is ideally suited for probing the electronic structure of surfaces at the nanoscale. During this seminary, I shall review some of the recent experiments undertaken in our group, in close interaction with the growing Grenoble community involved in this 2D-materials field.

Agenda

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