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

Luo, Zhe; Maassen, Jesse; Deng, Yexin; Du, Yuchen; Garrelts, Richard P.; Lundstrom, Mark; Ye, Peide D.; Xu, Xianfan

doi:10.1038/ncomms9572

articleNature CommunicationsOct 16, 2015GOLD OA

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

ZLZhe Luo JMJesse Maassen YDYexin Deng YDYuchen Du RPRichard P. Garrelts

Purdue University West Lafayette

PubMed

Indexed inarxivcrossrefdoajpubmed

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…

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Topics & keywords

Topics

Keywords

Zigzag
Anisotropy
Black phosphorus
Thermal conductivity
Phonon
Materials science
Condensed matter physics
Raman spectroscopy

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