First-principles study of heat transport properties of graphene nanoribbons - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




First-principles study of heat transport properties of graphene nanoribbons - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We combine density-functional theory and the nonequilibrium Green-s functionmethod to study the thermal conductance of graphene nanoribbons with armchairand zigzag edges. Zigzag ribbons have higher thermal conductance than armchairribbons of comparable widths due to an anisotropy in phonon dispersion forgraphene nanoribbons: low-frequency bands in zigzag ribbons are more dispersivethan those in armchair ribbons. The edges with and without hydrogen-passivationmodify the atomic structure and ultimately influence the phonon thermaltransport differently for the two ribbon types.



Author: Zhen Wah Tan, Jian-Sheng Wang, Chee Kwan Gan

Source: https://arxiv.org/



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