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   Electrical Control over Phonon Polarization in Strained Graphene; Reichardt, Sven  ; et alin Nano Letters (2021), 21(7), 2898--2904 Detailed reference viewed: 194 (2 UL)Engineering Tunable Strain Fields in Suspended Graphene by Microelectromechanical Systems; ; et al in 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) (2019, August 22) Detailed reference viewed: 154 (8 UL) Impact of many-body effects on Landau levels in graphene; Reichardt, Sven ; Wirtz, Ludger et alin Physical Review Letters (2018), 120(18), 187701 We present magneto-Raman spectroscopy measurements on suspended graphene to investigate the charge carrier density-dependent electron-electron interaction in the presence of Landau levels. Utilizing gate ... [more ▼] We present magneto-Raman spectroscopy measurements on suspended graphene to investigate the charge carrier density-dependent electron-electron interaction in the presence of Landau levels. Utilizing gate-tunable magnetophonon resonances, we extract the charge carrier density dependence of the Landau level transition energies and the associated effective Fermi velocity vF. In contrast to the logarithmic divergence of vF at zero magnetic field, we find a piecewise linear scaling of vF as a function of the charge carrier density, due to a magnetic-field-induced suppression of the long-range Coulomb interaction. We quantitatively confirm our experimental findings by performing tight-binding calculations on the level of the Hartree-Fock approximation, which also allow us to estimate an excitonic binding energy of ≈6 meV contained in the experimentally extracted Landau level transitions energies. [less ▲] Detailed reference viewed: 253 (11 UL)Tailoring mechanically tunable strain fields in graphene; ; et al in Nano Letters (2018), 18(3), 1707--1713 Detailed reference viewed: 190 (1 UL)Line shape of the Raman 2D peak of graphene in van der Waals heterostructures; ; et al in Physica Status Solidi B. Basic Research (2016), 253(12), 2326--2330 Detailed reference viewed: 198 (0 UL) |
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