کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1593301 1002694 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Manifestation of LO–LA phonons in Raman scattering in graphene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Manifestation of LO–LA phonons in Raman scattering in graphene
چکیده انگلیسی

We analyze the spectral density of Raman scattering in graphene accompanied by the emission of a pair of LO or LA phonons from the corner of the Brillouin zone. Using a minimal tight-binding model approach, we find that the lineshape of the corresponding Raman signal consists of two peaks with a strongly non-Lorentzian (almost triangular) form with their width and the splitting between the peaks being strongly dependent on the energy of the incoming photon. The asymmetric lineshape is determined by the kinematics of the fully-resonant two-phonon process, and it reflects a strong anisotropy of LO–LA phonons’ dispersion around the Brillouin zone corners.


► We model Raman scattering in graphene accompanied by the emission of a pair of phonons.
► We take into account longitudinal phonons from the corner of the Brillouin zone.
► The lineshape consists of two peaks with a strongly non-Lorentzian form.
► The lineshape reflects a strong anisotropy of longitudinal phonons’ dispersion.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 151, Issue 16, August 2011, Pages 1071–1074
نویسندگان
, , , , ,