Two Dimensional Phonon Transport in Graphene

ORAL

Abstract

We present thermal conductivity measurements of monolayer graphene exfoliated on a silicon dioxide substrate at different temperatures. A nanofabricated resistance thermometer device is developed to measure the thermal conductance of graphene and supporting 300nm thick SiO$_{2}$ layer, which allows us to extract the thermal conductivity of graphene while supported on this layer. The measured value is as high as 600 W/mK near room temperature, which is lower than that of suspended graphene, 1500-5800 W/mK, but still higher than those of metal interconnects. Theoretical calculations show that the strong interface-scattering of flexural modes across the graphene-oxide interface is responsible for the decreased value.

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Authors

  • Insun Jo

    • Department of Physics, The University of Texas at Austin

  • Jae Hun Seol

    • Department of Mechanical Engineering, The University of Texas at Austin

  • Arden L. Moore

    • Department of Mechanical Engineering, The University of Texas at Austin

  • Michael T. Pettes

    • Department of Mechanical Engineering, The University of Texas at Austin

  • Lucas Lindsay

    • Department of Physics - Boston College

  • Natalio Mingo

    • Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les Nanomat\'eriaux, Commissariat \`a l'\'Energie Atomique Grenoble

  • David Broido

    • Department of Physics - Boston College

  • Zhen Yao

    • Department of Physics, The University of Texas at Austin

  • Li Shi

    • Department of Mechanical Engineering, The University of Texas at Austin