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First-principles analysis of lattice thermal conductivity in monolayer and bilayer graphene

机译:单层和双层石墨烯中晶格热导率的第一性原理分析

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Using calculations from first principles, we investigate the lattice thermal conductivity of ideal monolayer and bilayer graphenes. Our result estimates that the intrinsic thermal conductivity of both materials is around 2200 W m~(-1) K~(-1) at 300 K, a value close to the one observed theoretically and experimentally in graphite along the basal plane. It also illustrates the expected T~(-1) dependence at higher temperatures. The little vfiriation between monolayer and bilayer thermal conductivities suggests that the number of layers may not affect significantly the in-plane thermal properties of these systems. The intrinsic thermal conductivity also appears to be nearly isotropic for graphene.
机译:使用第一性原理的计算,我们研究了理想的单层和双层石墨烯的晶格热导率。我们的结果估计,这两种材料的固有热导率在300 K时约为2200 W m〜(-1)K〜(-1),该值接近于理论和实验中沿基面在石墨中观察到的值。它还说明了在较高温度下预期的T〜(-1)依赖性。单层和双层热导率之间的微小变化表明,层数可能不会显着影响这些系统的面内热性能。石墨烯的固有热导率似乎也各向同性。

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