DOI: 10.1038/ncomms9572. Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus

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

10.1038/ncomms9572

Crossref journal-article

Springer Science and Business Media LLC

Nature Communications (297)

Abstract

AbstractBlack 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.

Bibliography

Luo, Z., Maassen, J., Deng, Y., Du, Y., Garrelts, R. P., Lundstrom, M. S., Ye, P. D., & Xu, X. (2015). Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus. Nature Communications, 6(1).

Authors 8

Zhe Luo (first)
Jesse Maassen (additional)
Yexin Deng (additional)
Yuchen Du (additional)
Richard P. Garrelts (additional)
Mark S Lundstrom (additional)
Peide D. Ye (additional)
Xianfan Xu (additional)

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Dates

Type	When
Created	9 years, 10 months ago (Oct. 16, 2015, 5:55 a.m.)
Deposited	2 years, 7 months ago (Jan. 5, 2023, 5:39 a.m.)
Indexed	17 hours, 19 minutes ago (Aug. 22, 2025, 12:54 a.m.)
Issued	9 years, 10 months ago (Oct. 16, 2015)
Published	9 years, 10 months ago (Oct. 16, 2015)
Published Online	9 years, 10 months ago (Oct. 16, 2015)

Funders 0

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BibTeX

@article{Luo_2015, title={Anisotropic in-plane thermal conductivity observed in few-layer black phosphorus}, volume={6}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/ncomms9572}, DOI={10.1038/ncomms9572}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Luo, Zhe and Maassen, Jesse and Deng, Yexin and Du, Yuchen and Garrelts, Richard P. and Lundstrom, Mark S and Ye, Peide D. and Xu, Xianfan}, year={2015}, month=oct }

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