Quantum gases in semiconductor van der Waals heterostructures

Principal investigators

  1. Alexander Steinhoff-List, University of Bremen, asteinhoff (at) itp.uni-bremen.de
  2. Alexey Chernikov, University of Regensburg, alexey.chernikov (at) ur.de [website]
  3. Alexander Högele, Ludwig Maximilian University, alexander.hoegele (at) physik.uni-muenchen.de [website]

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We aim to explore the paradigms of quantum gases in the framework of semiconducting van der Waals heterostructures. We will focus on previously unexplored, complex many-body interactions beyond the composite boson picture of individual interlayer excitons towards dense Fermi-Bose mixtures and increasingly exotic regimes of correlated electron-hole plasma representing mixed Fermi liquids. The dipolar nature of quasiparticles in semiconductor van der Waals heterostructures combined with their unprecedented tunability, broad capabilities for environmental design and ultra-fast manipulation offer unique prospects for fundamental research and potential technological applications.

In our experiments, we will control the composition of bosonic and fermionic species by carefully tuned optical and electrical injection, combined with an array of state-of-the-art methods to investigate spectrally-, temporally-, and spatially-resolved response. High-level many-particle calculations based on non-equilibrium Green function techniques will provide a quantitative, microscopic description of quantum gases and guide our studies towards most intriguing phenomena.