Symmetry-Breaking Supercollisions in Landau-Quantized Graphene
Symmetry-Breaking Supercollisions in Landau-Quantized Graphene
Wendler, F.; Mittendorff, M.; König-Otto, J. C.; Brem, S.; Berger, C.; de Heer, W. A.; Böttger, R.; Schneider, H.; Helm, M.; Winnerl, S.; Malic, E.
Abstract
Recent pump-probe experiments performed on graphene in a perpendicular magnetic field have revealed carrier relaxation times ranging from picoseconds to nanoseconds depending on the quality of the sample. To explain this surprising behavior, we propose a novel symmetry-breaking defect-assisted relaxation channel. This enables scattering of electrons with single out-of-plane phonons, which drastically accelerate the carrier scattering time in low-quality samples. The gained insights provide a strategy for tuning the carrier relaxation time in graphene and related materials by orders of magnitude.
Keywords: Carrier dynamics; graphene; Landau quantization; supercollisions
Beteiligte Forschungsanlagen
- Strahlungsquelle ELBE DOI: 10.17815/jlsrf-2-58
Verknüpfte Publikationen
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 24861) publication
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Physical Review Letters 119(2017), 067405
DOI: 10.1103/PhysRevLett.119.067405
ISSN: 0031-9007
Cited 10 times in Scopus
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