Valence force field model for phonons in graphene and graphene nanoribbons
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ASKEROV, Artur. Valence force field model for phonons in graphene and graphene nanoribbons. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 88.
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Materials Science and Condensed Matter Physics
Ediția 9, 2018
Conferința "International Conference on Materials Science and Condensed Matter Physics"
9, Chișinău, Moldova, 25-28 septembrie 2018

Valence force field model for phonons in graphene and graphene nanoribbons

CZU: 544.169:538.915

Pag. 88-88

Askerov Artur
 
Moldova State University
 
Disponibil în IBN: 16 ianuarie 2019


Rezumat

Monoatomic sheet of sp2-hybridized carbon atoms – graphene demonstrates unique thermal and electrical properties due to its quasi–two-dimensional electron and phonon states [1-2]. Extremely high values of thermal conductivity [3-4] and electron mobility [5] make graphene a promising material for future micro- and nanoelectronics. Heat transport in graphene and graphene nanoribbons is dominated by acoustic phonons owing the exceptionally strong sp2 covalent bonding of its lattice.  In this talk we develop valence force field (VFF) model for phonons in graphene and graphene nanoribbons. We demonstrate that different chirality of graphene nanoribbons (arm-chair or zigzag) substantially influence phonon energy spectra and phonon density of states. We also discuss the role of nanoribbons width and chirality on the thermal transport.