Journal
NANO LETTERS
Volume 15, Issue 3, Pages 1547-1552Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl5038825
Keywords
Graphene; boron nitride; magneto-Raman spectroscopy; Landau levels; Fermi velocity
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Funding
- Helmholtz Nanoelectronic Facility (HNF)
- DFG
- ERC [280140]
- EU [NECT-ICT-604391]
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Many-body effects resulting from strong electron-electron and electron-phonon interactions play a significant role in graphene physics. We report on their manifestation in low B field magneto-phonon resonances in high-quality exfoliated single-layer and bilayer graphene encapsulated in hexagonal boron nitride. These resonances allow us to extract characteristic effective Fermi velocities, as high as 1.20 x 10(6) m/s, for the observed dressed Landau level transitions, as well as the broadening of the resonances, which increases with the Landau level index.
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