Thermal conductivity of epitaxial graphene nanoribbons on SiC: effect of substrate

Autor:	Guo, Zhi-Xin, Ding, J. W., Gong, Xin-Gao
Rok vydání:	2012
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 85, 235429 (2012)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.85.235429
Popis:	We study the effect of SiC substrate on thermal conductivity of epitaxial graphene nanoribbons (GNRs) using the nonequilibrium molecular dynamics method. We show that the substrate has strong interaction with single-layer GNRs during the thermal transport, which largely reduces the thermal conductivity. The thermal conductivity characteristics of suspended GNRs are well preserved in the second GNR layers of bilayer GNR, which has a weak van der Waals interaction with the underlying structures. The out-of-plane phonon mode is found to play a critical role on the thermal conductivity variation of the second GNR layer induced by the underlying structures. Comment: 5 pages, 4 figures, 1 table
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1201.6355 Zobrazit plný text záznamu View this record from Arxiv