Symmetry-Breaking Supercollisions in Landau-Quantized Graphene
| Autor: | Claire Berger, Walt A. de Heer, Ermin Malic, Florian Wendler, Stephan Winnerl, Samuel Brem, Harald Schneider, Martin Mittendorff, Roman Böttger, Jacob C. König-Otto, Manfred Helm |
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| Přispěvatelé: | Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Circuits électroniques quantiques Alpes (QuantECA ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Georgia Institute of Technology [Atlanta], Department for Theoretical Physics, Technische Universität Berlin (TU) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Phonon Carrier dynamics FOS: Physical sciences General Physics and Astronomy 02 engineering and technology Electron 01 natural sciences law.invention law 0103 physical sciences supercollisions Symmetry breaking 010306 general physics ComputingMilieux_MISCELLANEOUS [PHYS]Physics [physics] Condensed Matter - Materials Science Condensed matter physics Scattering Graphene Carrier scattering Relaxation (NMR) graphene Materials Science (cond-mat.mtrl-sci) Landau quantization 021001 nanoscience & nanotechnology Orders of magnitude (time) Physical Sciences 0210 nano-technology |
| Zdroj: | Physical Review Letters 119(2017), 067405 Physical Review Letters Physical Review Letters, American Physical Society, 2017, 119 (6), pp.067405. ⟨10.1103/PhysRevLett.119.067405⟩ Physical Review Letters (0031-9007) vol.119(2017) |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/PhysRevLett.119.067405⟩ |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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