Berlin 2024 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 9: Focus Session: Anomalous Quantum Oscillations
TT 9.7: Talk
Monday, March 18, 2024, 18:00–18:15, H 0104
Interaction-induced quantum oscillations of the lifetime — •Przemyslaw Bieniek1, Valentin Leeb1, and Johannes Knolle1,2 — 1Technical University of Munich, Germany — 2Imperial College London, United Kingdom
In the last few years, several deviations from the standard theory of quantum oscillations, as well as new theories, have been reported. Recently, it was demonstrated in CoSi that interband impurity scattering can lead to fundamentally new frequencies [Huber et al. Nature 2023; Leeb, Knolle PRB 2023]. Similar phenomena occur in 2D electron gases [Polyanovsky 1988]. However in all works, the effect of interactions was neglected completely. Here, we show that already simple Hubbard interactions lead to oscillations of the lifetime, eventually appearing as new quantum oscillation frequencies. We extend our analysis to more generic Coulomb interactions. Our results provide an alternative scenario for the microscopic scattering mechanism in CoSi.
Keywords: Quantum oscillations; Hubbard interactions