References of "Beschoten, Bernd"
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See detailElectrical Control over Phonon Polarization in Strained Graphene
Sonntag, Jens; Reichardt, Sven UL; Beschoten, Bernd et al

in Nano Letters (2021), 21(7), 2898--2904

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See detailImpact of many-body effects on Landau levels in graphene
Sonntag, Jens; Reichardt, Sven UL; Wirtz, Ludger UL et al

in 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 ▲]

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See detailLine shape of the Raman 2D peak of graphene in van der Waals heterostructures
Neumann, Christoph; Banszerus, Luca; Schmitz, Michael et al

in Physica Status Solidi B. Basic Research (2016), 253(12), 2326--2330

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See detailSpatial control of laser-induced doping profiles in graphene on hexagonal boron nitride
Neumann, Christoph; Rizzi, Leo; Reichardt, Sven UL et al

in ACS Applied Materials and Interfaces (2016), 8(14), 9377-9383

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See detailProbing electronic lifetimes and phonon anharmonicities in high-quality chemical vapor deposited graphene by magneto-Raman spectroscopy
Neumann, Christoph; Halpaap, Donatus; Reichardt, Sven UL et al

in Applied Physics Letters (2015), 107(23), 233105

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See detailRaman spectroscopy as probe of nanometre-scale strain variations in graphene
Neumann, Christoph; Reichardt, Sven UL; Venezuela, Pedro et al

in Nature Communications (2015), 6

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See detailRaman spectroscopy as probe of nanometre-scale strain variations in graphene
Neumann, Christoph; Reichardt, Sven UL; Venezuela, Pedro et al

Poster (2015, July 14)

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See detailLow B field magneto-phonon resonances in single-layer and bilayer graphene
Neumann, Christoph; Reichardt, Sven UL; Drögeler, Marc et al

in Nano Letters (2015), 15(3), 1547--1552

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