External Seminar Archive



Rydberg Excitons in Cuprous Oxide – Fred Combley Colloquium

Rydberg Excitons in Cuprous Oxide Manfred Bayer Experimentelle Physik 2, Fakultät Physik, TU Dortmund, D-44227 Dortmund, Germany   Excitons determine the optical properties of semiconductors. Their description as hydrogen atom-like…

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Graphene in van der Waals heterostructures and transistors

Graphene tunnelling transistors are made by sandwiching a nanometre-thick barrier layer of hexagonal boron nitride (hBN) between two monolayer graphene electrodes.  The tunnel current is controlled by the bias voltage…

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Atomic and electronic structure in van der Waals heterostructures

Two-dimensional materials (2DM) have strong in-plane bonding, but typically only weak van der Waals interactions with neighbouring material. It is this anisotropy which allows them to be isolated as layers,…

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