Breit-Wigner-Fano line shapes in Raman spectra of graphene
Name
PhysRevB.90.245140.pdf
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1.45 MB
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Adobe PDF
Checksum (MD5)
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Author(s)
Hasdeo, Eddwi H.
Nugraha, Ahmad R. T.
Saito, Riichiro
Dresselhaus, Mildred
Date Issued
December 2014
Journal
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.90.245140
