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DS: Fachverband Dünne Schichten

DS 4: Focus Session: Two-dimensional materials I (jointly with HL/TT)

DS 4.1: Hauptvortrag

Montag, 20. März 2017, 09:30–10:00, POT 81

Van der Waals heterostructures: tunnelling and interaction with light — •Artem Mishchenko — School of Physics and Astronomy, The University of Manchester, Manchester, UK

When graphene or other conducting 2D crystals are separated by an atomically thin insulating 2D crystal (e.g. hexagonal boron nitride), quantum mechanical tunnelling leads to the appreciable interlayer current between the two 2D conductors due to the overlap of their wave functions. These tunnel devices reveal exciting physics and great potential for applications: resonant tunnelling, negative differential conductance, light emission and detection, to name a few. Here, I will update on a current status and perspectives of tunnelling devices and quantum wells based on 2D materials assembled into van der Waals heterostructures. Particularly, I will present the results on tunnelling in mono- and bilayer graphene, tunnelling in 2D crystal-based quantum wells, and tunnelling in superconducting 2D materials. I will overview such effects as momentum and chirality conservation, phonon- and impurity-assisted tunnelling. Furthermore, interaction with light (i.e. photovoltaics, solar cells, light emission, lasing and plasmonics) within these heterostructures will be discussed. Finally, possible practical applications will be outlined.