Project B10

Dissipation control of the (opto-)electronic properties of two-dimensional materials via controlled stacking and twisting

We will study new strategies for atomic scale control of energy conversion in van-der-Waals materials by tuning (i) the stacking order of (hetero-)layers, (ii) their relative twist angle, and (iii) the charge carrier density and layer inversion symmetry. Using quantum transport and variable temperature scanning near-field measurements, our goal is to untie the impact of electron-phonon (e-p) and electron-electron (e-e) interaction on quasi-particle excitations in the normal and superconductive phases of twisted bilayer graphene. Furthermore, based on time-resolved momentum microscopy, we aim to control e-e and e-p scattering pathways that dominate the ultrafast energy dissipation of optical excitations.