publication . Preprint . 2014

Long-wavelength optical phonon behavior in uniaxial strained graphene: Role of electron-phonon interaction

Assili, Mohamed; Haddad, Sonia;
Open Access English
  • Published: 12 Mar 2014
Abstract
We derive the frequency shifts and the broadening of $\Gamma$ point longitudinal optical (LO) and transverse optical (TO) phonon modes, due to electron-phonon interaction, in graphene under uniaxial strain as a function of the electron density and the disorder amount. We show that, in the absence of a shear strain component, such interaction gives rise to a lifting of the degeneracy of the LO and TO modes which contributes to the splitting of the G Raman band. The anisotropy of the electronic spectrum, induced by the strain, results in a polarization dependence of the LO and TO modes. This dependence is in agreement with the experimental results showing a period...
Subjects
arXiv: Condensed Matter::Materials Science
free text keywords: Condensed Matter - Mesoscale and Nanoscale Physics
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