Philip Hofmann

Electronic structure and electron dynamics in two-dimensional materials

Artificial two-dimensional (2D) materials, such as graphene or single-layer transition metal dichalcogenides, have electronic properties that are drastically different from those of their parent compounds. Moreover, these properties do not only depend on the 2D materials as such but also on their environment, for example on the substrate they are placed on. In this talk, I will illustrate how fundamental aspects of the electronic structure, such as the band gap of a semiconducting 2D material or the band dispersion in a 2D metal can be controlled, either by the substrate or by a transient excitation using ultrafast laser pulses.