%0 Journal Article
%A farghadan, R
%A Masoodi nia, F
%T The effect of extended vacancies on the thermal properties of armchair garaphene nanoribbons
%J Iranian Journal of Physics Research
%V 18
%N 2
%U http://ijpr.iut.ac.ir/article-1-2382-en.html
%R 10.29252/ijpr.18.2.322
%D 2018
%K Extended Vacancies, Armchair Graphene Nanoribbons, Specific Heat, Thermal Conductivity,
%X This paper shows a theoretical study of the thermal properties of armchair grapehen nanoribbons in the presence of extended vacancies. Each graphene nanoribbons formed by superlattices with a periodic geometric structure, different size and symmetry of vacancies. The phonon dispersion, specific heat and thermal conductivity properties are described by a force-constant model and also by Landauer theory calculations. Our results show that the geometric structure of the vacancies and their positions have a significant roles in controlling the thermal properties, especially at low temperatures. Moreover, the out-of-plane and in-plane phonon modes exhibit a different role in the heat capacity and thermal phonon transport properties. Moreover, the out-of-plane phonon modes have more contribution in low temperature regime rather than in-plane phonon modes even in the presence of extended vacancies. The result may be useful for the design and improvement of thermal or thermoelectric nanodevices.
%> http://ijpr.iut.ac.ir/article-1-2382-en.pdf
%P 322-329
%& 322
%!
%9 Research
%L A-10-2991-1
%+ Department of Physics, University of Kashan, Kashan, Iran
%G eng
%@ 1682-6957
%[ 2018