Dissipation control of the (opto-) electronic properties of two-dimensional materials via controlled stacking and twisting (B10*)

• Subject Area: Experimental Condensed Matter Physics
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 217133147

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.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1073: Atomic Scale Control of Energy Conversion
• Applicant Institution: Georg-August-Universität Göttingen
• Project Heads: Dr. Marcel Reutzel; Professor Dr. R. Thomas Weitz