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Ballistic to diffusive crossover of heat flow in graphene ribbons

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  • Myung-Ho Bae

    (Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign
    Present address: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea)

  • Zuanyi Li

    (Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign)

  • Zlatan Aksamija

    (University of Wisconsin-Madison)

  • Pierre N Martin

    (University of Illinois at Urbana-Champaign)

  • Feng Xiong

    (Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign
    Beckman Institute, University of Illinois at Urbana-Champaign)

  • Zhun-Yong Ong

    (Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign)

  • Irena Knezevic

    (University of Wisconsin-Madison)

  • Eric Pop

    (Micro and Nanotechnology Lab, University of Illinois at Urbana-Champaign
    University of Illinois at Urbana-Champaign
    Beckman Institute, University of Illinois at Urbana-Champaign)

Abstract

Heat flow in nanomaterials is an important area of study, with both fundamental and technological implications. However, little is known about heat flow in two-dimensional devices or interconnects with dimensions comparable to the phonon mean free path. Here we find that short, quarter-micron graphene samples reach ~35% of the ballistic thermal conductance limit up to room temperature, enabled by the relatively large phonon mean free path (~100 nm) in substrate-supported graphene. In contrast, patterning similar samples into nanoribbons leads to a diffusive heat-flow regime that is controlled by ribbon width and edge disorder. In the edge-controlled regime, the graphene nanoribbon thermal conductivity scales with width approximately as ~W1.80.3, being about 100 W m−1 K−1 in 65-nm-wide graphene nanoribbons, at room temperature. These results show how manipulation oftwo-dimensional device dimensions and edges can be used to achieve full control of their heat-carrying properties, approaching fundamentally limited upper or lower bounds.

Suggested Citation

  • Myung-Ho Bae & Zuanyi Li & Zlatan Aksamija & Pierre N Martin & Feng Xiong & Zhun-Yong Ong & Irena Knezevic & Eric Pop, 2013. "Ballistic to diffusive crossover of heat flow in graphene ribbons," Nature Communications, Nature, vol. 4(1), pages 1-7, June.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms2755
    DOI: 10.1038/ncomms2755
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    Cited by:

    1. Xin Huang & Yangyu Guo & Yunhui Wu & Satoru Masubuchi & Kenji Watanabe & Takashi Taniguchi & Zhongwei Zhang & Sebastian Volz & Tomoki Machida & Masahiro Nomura, 2023. "Observation of phonon Poiseuille flow in isotopically purified graphite ribbons," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Giacomo Mazza & Marco Gandolfi & Massimo Capone & Francesco Banfi & Claudio Giannetti, 2021. "Thermal dynamics and electronic temperature waves in layered correlated materials," Nature Communications, Nature, vol. 12(1), pages 1-11, December.

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