Promotionsvortrag Physik: Electronic transport in graphene-based nanostructures

Mar 22
22. March 2019 13:00 - 14:00
SR 00.103, Angewandte Physik, Staudtstraße 7, Erlangen

Einladung zum Promotionsvortrag von Herrn Dominik Weckbecker:
„Electronic transport in graphene-based nanostructures“

Since its experimental discovery, graphene has attracted significant and sustained attention from both theoretical and experimental researchers due to its many outstanding features such as low-energy electrons behaving like ultrarelativistic massless quasiparticles. With such features, graphene is a potential candidate for use in future nanoelectronics devices. In this talk, we present our work on two different routes to the potential realization of such applications.
The first is to employ graphene as electrode material in single-molecule junctions, whose study is a central topic in the field of molecular electronics. Specifically, we investigate molecular junctions featuring conductance switching based on intramolecular proton transfer as a novel mechanism. Our simulations of electronic transport performed in the framework of density functional theory and the nonequilibrium Green’s function formalism establish that molecular nanodiodes or transistors can potentially be realized based on this mechanism.
The second route is the modification of the electronic properties of graphene via the addition of a second layer. Especially when the two layers are mutually rotated, the electronic structure becomes extremely feature-rich and complicated to describe. We develop a low-energy theory which allows for an efficient treatment of the electronic structure of such systems and make use of it to explore its electronic structure in the regime of very small rotation angles. (Vortrag auf Englisch)

Dem Vortrag schließt sich eine Diskussion von 15 Minuten an. Vortrag und Diskussion sind öffentlich. Diesen Verfahrensteilen folgt ein nicht öffentliches Rigorosum von 45 Minuten.