Effective many-body physics of fermions in low-dimensional materials (C07*)

• Subject Area: Theoretical Condensed Matter Physics ; Experimental Condensed Matter Physics
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 273811115

We will develop a unified effective theory for the many-body physics of electrons, excitons, and trions in quasi-one-dimensional, single-walled carbon nanotubes (SWNTs) and study the transition of this many-body system from being described by an effective theory of composite quasiparticles into a system governed by the dynamics of fundamental charge carriers. Specifically, we will derive an effective theory for exciton-electron scattering in SWNTs and predict their optical response as a function of doping and temperature. The theory will be benchmarked against high-precision experimental data that we will obtain from dispersions and networks of purified monochiral SWNTs that are chemically, electrochemically or chemically doped from cryogenic to room temperature.

• DFG Programme: Collaborative Research Centres
• Subproject of: SFB 1225: Isolated quantum systems and universality in extreme conditions (ISOQUANT)
• Applicant Institution: Ruprecht-Karls-Universität Heidelberg
• Project Heads: Professor Dr. Richard Schmidt; Professorin Dr. Jana Zaumseil