Temperature Dependence of Anisotropic Thermal-Conductivity Tensor of Bulk Black Phosphorus

Bo Sun; Xiaokun Gu; Qingsheng Zeng; Xi Huang; Yuexiang Yan; Zheng Liu; Ronggui Yang; Yee Kan Koh

doi:10.1002/adma.201603297

Temperature Dependence of Anisotropic Thermal-Conductivity Tensor of Bulk Black Phosphorus

Adv Mater. 2017 Jan;29(3). doi: 10.1002/adma.201603297. Epub 2016 Nov 17.

Authors

Bo Sun¹, Xiaokun Gu², Qingsheng Zeng³, Xi Huang¹, Yuexiang Yan¹, Zheng Liu³, Ronggui Yang², Yee Kan Koh^{1

4}

Affiliations

¹ Department of Mechanical Engineering, National University of Singapore, 117576, Singapore.
² Department of Mechanical Engineering, University of Colorado at Boulder, CO, 80309, USA.
³ Centre for Programmed Materials, School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
⁴ Centre for Advanced 2D Materials, National University of Singapore, 117542, Singapore.

PMID: 27859658
DOI: 10.1002/adma.201603297

Abstract

The anisotropic thermal-conductivity tensor of bulk black phosphorus (BP) for 80 ≤T ≤ 300 K is reported. Despite the anisotropy, phonons are predominantly scattered by Umklapp processes in all the crystallographic orientations. It is also found that the phonon mean-free-paths of BP are rather long (up to 1 µm) in the through-plane direction.

Keywords: 2D materials; anisotropic heat conduction; black phosphorus; metal/BP interfaces; phonon mean-free-paths.