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Phonon switching and combined Fano-Rice effect in optical spectra of bilayer graphene

Publication date2010-07-09
First online date2010-07-09
Abstract

Recent infrared measurements of phonon peaks in gated bilayer graphene reveal two striking signatures of electron-phonon interaction: an asymmetric Fano lineshape and a giant variation in the peak intensity as a function of the applied gate voltage. In this Rapid Communication we provide a unified theoretical framework which accounts for both these effects and unveils the occurrence of a switching mechanism between symmetric (Eg) and antisymmetric (Eu) phonon modes as dominant channel in the optical response. A complete phase diagram of the optical phonon response is also presented, as a function of both the charge density and the band gap.

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Citation (ISO format)
CAPPELLUTI, E., BENFATTO, L., KUZMENKO, Alexey. Phonon switching and combined Fano-Rice effect in optical spectra of bilayer graphene. In: Physical review. B, Condensed matter and materials physics., 2010, vol. 82, n° 4, p. 041402. doi: 10.1103/PhysRevB.82.041402
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ISSN of the journal1098-0121
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