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Magnetoplasmons in quasi-neutral epitaxial graphene nanoribbons

Abstract : We present infrared transmission spectroscopy study of the inter-Landau-level excitations in quasi-neutral epitaxial graphene nanoribbon arrays. We observed a substantial deviation in energy of the $L_{0(-1)}$$\to$$L_{1(0)}$ transition from the characteristic square root magnetic-field dependence of two-dimensional graphene. This deviation arises from the formation of upper-hybrid mode between the Landau level transition and the plasmon resonance. In the quantum regime the hybrid mode exhibits a distinct dispersion relation, markedly different from that expected for conventional two-dimensional systems and highly doped graphene.
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https://hal.archives-ouvertes.fr/hal-00911214
Contributor : Claire Berger <>
Submitted on : Friday, November 29, 2013 - 3:23:52 AM
Last modification on : Saturday, April 24, 2021 - 12:52:02 PM

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Jean-Marie Poumirol, W. Yu, X. Chen, Claire Berger, W. A. de Heer, et al.. Magnetoplasmons in quasi-neutral epitaxial graphene nanoribbons. Physical Review Letters, American Physical Society, 2013, 110 (24), pp.246803. ⟨10.1103/PhysRevLett.110.246803⟩. ⟨hal-00911214⟩

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