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Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus

Author

Listed:
  • Zhe Luo

    (School of Mechanical Engineering, Purdue University
    Birck Nanotechnology Center, Purdue University)

  • Jesse Maassen

    (Birck Nanotechnology Center, Purdue University
    School of Electrical and Computer Engineering, Purdue University)

  • Yexin Deng

    (Birck Nanotechnology Center, Purdue University
    School of Electrical and Computer Engineering, Purdue University)

  • Yuchen Du

    (Birck Nanotechnology Center, Purdue University
    School of Electrical and Computer Engineering, Purdue University)

  • Richard P. Garrelts

    (School of Mechanical Engineering, Purdue University
    Birck Nanotechnology Center, Purdue University)

  • Mark S Lundstrom

    (Birck Nanotechnology Center, Purdue University
    School of Electrical and Computer Engineering, Purdue University)

  • Peide D. Ye

    (Birck Nanotechnology Center, Purdue University
    School of Electrical and Computer Engineering, Purdue University)

  • Xianfan Xu

    (School of Mechanical Engineering, Purdue University
    Birck Nanotechnology Center, Purdue University)

Abstract

Black phosphorus has been revisited recently as a new two-dimensional material showing potential applications in electronics and optoelectronics. Here we report the anisotropic in-plane thermal conductivity of suspended few-layer black phosphorus measured by micro-Raman spectroscopy. The armchair and zigzag thermal conductivities are ∼20 and ∼40 W m−1 K−1 for black phosphorus films thicker than 15 nm, respectively, and decrease to ∼10 and ∼20 W m−1 K−1 as the film thickness is reduced, exhibiting significant anisotropy. The thermal conductivity anisotropic ratio is found to be ∼2 for thick black phosphorus films and drops to ∼1.5 for the thinnest 9.5-nm-thick film. Theoretical modelling reveals that the observed anisotropy is primarily related to the anisotropic phonon dispersion, whereas the intrinsic phonon scattering rates are found to be similar along the armchair and zigzag directions. Surface scattering in the black phosphorus films is shown to strongly suppress the contribution of long mean-free-path acoustic phonons.

Suggested Citation

  • Zhe Luo & Jesse Maassen & Yexin Deng & Yuchen Du & Richard P. Garrelts & Mark S Lundstrom & Peide D. Ye & Xianfan Xu, 2015. "Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus," Nature Communications, Nature, vol. 6(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms9572
    DOI: 10.1038/ncomms9572
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    Cited by:

    1. Shuaiqin Wu & Yan Chen & Xudong Wang & Hanxue Jiao & Qianru Zhao & Xinning Huang & Xiaochi Tai & Yong Zhou & Hao Chen & Xingjun Wang & Shenyang Huang & Hugen Yan & Tie Lin & Hong Shen & Weida Hu & Xia, 2022. "Ultra-sensitive polarization-resolved black phosphorus homojunction photodetector defined by ferroelectric domains," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    2. Lijie Chen & Weitao Zhang & Hanlin Zhang & Jiawang Chen & Chaoyang Tan & Shiqi Yin & Gang Li & Yu Zhang & Penglai Gong & Liang Li, 2021. "In-Plane Anisotropic Thermal Conductivity of Low-Symmetry PdSe 2," Sustainability, MDPI, vol. 13(8), pages 1-10, April.

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