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Updated: Jul 11, 2026

Advanced Experimental Methods for Low-temperature Magnetotransport Measurement of Novel Materials
Published on: January 21, 2016
Filling-factor-dependent magnetophonon resonance in graphene
M O Goerbig1, J-N Fuchs, K Kechedzhi
1Laboratoire de Physique des Solides, Université Paris-Sud, CNRS UMR 8502, F-91405, Orsay, France.
Abstract:
We describe a peculiar fine structure acquired by the in-plane optical phonon at the Gamma point in graphene when it is brought into resonance with one of the inter-Landau-level transitions in this material. The effect is most pronounced when this lattice mode (associated with the G band in graphene Raman spectrum) is in resonance with inter-Landau-level transitions 0 --> +, 1 and -, 1 --> 0, at a magnetic field B{0} approximately 30 T. It can be used to measure the strength of the electron-phonon coupling directly, and its filling-factor dependence can be used experimentally to detect circularly polarized lattice vibrations.
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