Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevB.88.165407
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dc.titleStrong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy
dc.contributor.authorQiu, C.
dc.contributor.authorShen, X.
dc.contributor.authorCao, B.
dc.contributor.authorCong, C.
dc.contributor.authorSaito, R.
dc.contributor.authorYu, J.
dc.contributor.authorDresselhaus, M.S.
dc.contributor.authorYu, T.
dc.date.accessioned2014-10-16T09:42:19Z
dc.date.available2014-10-16T09:42:19Z
dc.date.issued2013-10-10
dc.identifier.citationQiu, C., Shen, X., Cao, B., Cong, C., Saito, R., Yu, J., Dresselhaus, M.S., Yu, T. (2013-10-10). Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy. Physical Review B - Condensed Matter and Materials Physics 88 (16) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.88.165407
dc.identifier.issn10980121
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/98042
dc.description.abstractThe resonance between the G-band phonon excitation and Landau level optical transitions in graphene has been systematically studied by micromagneto Raman mapping. In purely decoupled graphene regions on a graphite substrate, eight traces of anticrossing spectral features with G-mode peaks are observed as a function of magnetic fields up to 9 T, and these traces correspond to either symmetric or asymmetric Landau level transitions. Three distinct split peaks of the G mode, named G-, Gi, and G+, are observed at the strong magnetophonon resonance condition corresponding to a magnetic field of ∼4.65 T. These three special modes are attributed to (i) the coupling between the G phonon and the magneto-optical transitions, which is responsible for G+ and G- and can be well described by the two coupled mode model and (ii) the magnetic field-dependent oscillation of the Gi band, which is currently explained by the G band of graphite modified by the interaction with G+ and G-. The pronounced interaction between Dirac fermions and phonons demonstrates a dramatically small Landau level width (∼1.3 meV), which is a signature of the ultrahigh quality graphene obtained on the surface of graphite. © 2013 American Physical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1103/PhysRevB.88.165407
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1103/PhysRevB.88.165407
dc.description.sourcetitlePhysical Review B - Condensed Matter and Materials Physics
dc.description.volume88
dc.description.issue16
dc.description.page-
dc.description.codenPRBMD
dc.identifier.isiut000325503800003
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