TY - JOUR
ID - 3553
TI - Energy loss spectra of doped graphene and armchair carbon nanotubes at finite temperature
JO - Scientia Iranica
JA - SCI
LA - en
SN - 1026-3098
AU - Rezania, H.
AU - Taherkhan, F.
AD - Department of Physics, Razi University, Kermanshah, 0786534239456,, Iran
AD - Department of Chemistry, Razi University, Kermanshah, 075764684762,Iran
Y1 - 2014
PY - 2014
VL - 21
IS - 3
SP - 1179
EP - 1182
KW - energy loss
KW - Armchair
KW - Random Phase Approximation
KW - graphene
KW - nanotube
DO -
N2 - We have studied the dynamical polarizability associated to energy loss spectra of armchair carbon nanotubes in the context of tight binding model Hamiltonian including long range electronic interaction. Linear response theory in the context of random phase approximation has been implemented to obtain charge response function via calculating correlation function of density operators. The effects of both temperature and electron doping as well as the diameter on the frequency behaviour of charge response have been investigated. The sharp peak in the energy loss spectra of the armchair carbon nanotube disappears upon raising the temperature. This is not the case of non interacting case where temperature has no considerable effect on the dynamical susceptibility. Also, the similar calculations have been performed for graphene sheet.
UR - http://scientiairanica.sharif.edu/article_3553.html
L1 - http://scientiairanica.sharif.edu/article_3553_6cf61b39dc53a1ecdeb9ba33cc5ccb4e.pdf
ER -