Tailoring electronic correlations, excitonics and topological properties in van der Waals heterostructures on ultrafast timescales

Principal investigators

  1. Samuel Beaulieu, FHI Berlin, beaulieu (at) fhi-berlin.mpg.de [webpage]
  2. Ralph Ernstorfer, FHI Berlin, ernstorfer (at) fhi-berlin.mpg.de [webpage]

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Abstract

Our group is broadly interested in experimentally investigating the electronic and atomic structure of solids and heterostructures in out-of-equilibrium conditions. This project aims at getting a quantum state-resolved, microscopic understanding of the role of electronic correlations, excitonics and topological properties on ultrafast relaxation dynamics in prototypical heterobilayers made of semiconducting and of Weyl semimetallic transition metal dichalcogenides (TMDCs).

To achieve this goal, we will use multidimensional extreme ultraviolet (XUV) time- and angle-resolved photoemission spectroscopy (trARPES). The unique coupling of high-photon-energy (XUV), high-repetition-rate beamline with a 4D photoelectron detector, make our apparatus an extremely powerful tool to measure the electronic band structure of out-of-equilibrium vdW heterostructures.