Berlin 2024 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 9: Focus Session: Anomalous Quantum Oscillations

TT 9.7: Vortrag

Montag, 18. März 2024, 18:00–18:15, H 0104

Interaction-induced quantum oscillations of the lifetime — •Przemyslaw Bieniek¹, Valentin Leeb¹, and Johannes Knolle^1,2 — 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