Please use this identifier to cite or link to this item:
|Title:||Strong magnetophonon resonance induced triple G-mode splitting in graphene on graphite probed by micromagneto Raman spectroscopy||Authors:||Qiu, C.
|Issue Date:||10-Oct-2013||Citation:||Qiu, 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||Abstract:||The 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.||Source Title:||Physical Review B - Condensed Matter and Materials Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/98042||ISSN:||10980121||DOI:||10.1103/PhysRevB.88.165407|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Sep 12, 2019
WEB OF SCIENCETM
checked on Sep 4, 2019
checked on Sep 7, 2019
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.