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Title: Revealing the Origins of 3D Anisotropic Thermal Conductivities of Black Phosphorus
Author: Zhu, Jie1, 2; Park, Haechan4; Chen, Jun-Yang3; Gu, Xiaokun5; Zhang, Hu1, 6; Karthikeyan, Sreejith3; Wendel, Nathaniel3; Campbell, Stephen A.3; Dawber, Matthew4; Du, Xu4; Li, Mo3; Wang, Jian-Ping3; Yang, Ronggui5; Wang, Xiaojia1
Source: ADVANCED ELECTRONIC MATERIALS
Issued Date: 2016-05-01
Volume: 2, Issue:5
DOI: 10.1002/aelm.201600040
DOC Type: Article
English Abstract: Black phosphorus (BP) has emerged as a direct bandgap semiconducting material with great application potentials in electronics, photonics, and energy conversion. Experimental characterization of the anisotropic thermal properties of BP at the micrometer scale is extremely challenging. This study reports measurement results of the anisotropic thermal conductivity of BP along three primary crystalline orientations, using a novel time-resolved magneto-optical Kerr effect. The thermal conductivity along the zigzag crystalline direction is 84-101 W m(-1) K-1, nearly three times as large as that along the armchair direction (26-36 W m(-1) K-1). The through-plane thermal conductivity of BP ranges from 4.3 to 5.5 W m(-1) K-1. This study performs first-principles calculation to predict the phonon transport in BP along both in-plane through-plane directions, and identifies that the strong anisotropy of thermal transport in BP can be attributed to the structural-asymmetry-induced group velocity variations along different crystalline orientations, and the relaxation time variation induced by the direction of the applied temperature gradient. This work successfully unveils the fundamental mechanisms of anisotropic thermal transport along the three crystalline directions in BP, as demonstrated by the excellent agreement between the first-principles-based theoretical predictions and experimental characterizations on the anisotropic thermal conductivities of BP.
WOS Headings: Science & Technology ; Technology ; Physical Sciences
WOS Subject: Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Subject Extended: Science & Technology - Other Topics ; Materials Science ; Physics
WOS Keyword Plus: FIELD-EFFECT TRANSISTORS ; TRANSPORT ; GRAPHENE ; NANORIBBONS ; MOBILITY ; PHONONS ; ACCESS
Indexed Type: SCI
Funder: National Science Foundation (NSF) through the University of Minnesota MRSEC(DMR-1420013) ; National Natural Science Foundation of China(51336009 ; National Science Foundation(1511195 ; C-SPIN, one of six centers of STARnet, a Semiconductor Research Corporation program - MARCO ; DARPA ; NSF through the NNIN program ; NSF through the UMN MRSEC program ; University of Colorado Boulder ; University of Colorado Denver ; National Center for Atmospheric Research ; (NSF: DMR-1334867) ; 51206167) ; CNS-0821794)
Language: 英语
WOS ID: WOS:000377583600011
Citation statistics:
Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112458
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA
2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
3.Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA
4.SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
5.Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA
6.Xi An Jiao Tong Univ, Key Lab Thermofluid Sci & Engn MOE, Xian 710049, Shaanxi, Peoples R China
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