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  1. Home
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Browsing by Author "Kim, Y.J."

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    Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy
    (American Physical Society, 2013-05-29) Kim, Y.; Poumirol, J.M.; Lombardo, A.; Kalugin, N.G.; Georgiou, T.; Kim, Y.J.; Novoselov, K.S.; Ferrari, A.C.; Kono, J.; Kashuba, O.; Fal’ko, V.I.; Smirnov, D.
    We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45 T. This reveals a filling-factor-dependent, multicomponent anticrossing structure of the Raman G peak, resulting from magnetophonon resonances between magnetoexcitons and E2g phonons. This is explained with a model of Raman scattering taking into account the effects of spatially inhomogeneous carrier densities and strain. Random fluctuations of strain-induced pseudomagnetic fields lead to increased scattering intensity inside the anticrossing gap, consistent with the experiments.
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