Breit-Wigner-Fano line shapes in Raman spectra of graphene
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Excitation of electron-hole pairs in the vicinity of the Dirac cone by the Coulomb interaction gives rise to an asymmetric Breit-Wigner-Fano line shape in the phonon Raman spectra in graphene. This asymmetric line shape appears due to the interference effect between the phonon spectra and the electron-hole pair excitation spectra. The calculated Breit-Wigner-Fano asymmetric factor 1/q[subscript BWF] as a function of the Fermi energy shows a V-shaped curve with a minimum value at the charge neutrality point and gives good agreement with the experimental results.
Date issued
2014-12Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of PhysicsJournal
Physical Review B
Publisher
American Physical Society
Citation
Hasdeo, Eddwi H., Ahmad R. T. Nugraha, Mildred S. Dresselhaus, and Riichiro Saito. "Breit-Wigner-Fano line shapes in Raman spectra of graphene." Phys. Rev. B 90, 245140 (December 2014). © 2014 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X