Electronic structure and electron dynamics in two-dimensional dirac materials
25th July 2017, COLLOQUIUM OF THE CRC 1242, Raum MG 272, Campus Duisburg, UDE
Start: 25th July 2017 10:00 a.m.
End: 25th July 2017 12:00
Prof. Dr. Philip Hofmann,, Department of Physics and Astronomy, University of Aarhus, Denmark
Dr. Christian A. Bobisch, UDE
Artificial two-dimensional (2D) materials, such as graphene or single-layer transition metal dichalcogenides, permit the realization of massless and massive Dirac fermions. A special feature of the 2D materials is that their electronic properties, for instance their band gap, can be strongly influenced by either their dielectric environment or by the excited carrier density in the material.
Here we exploit this sensitivity to achieve a static and dynamic change in the electronic properties of 2D materials such as graphene and single layer WS2. This control of properties is demonstrated using scanning tunnelling microscopy and (time-resolved) angle-resolved photoemission spectroscopy.