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Strong anisotropic thermal conductivity of monolayer WTe2
Ma, JL; Chen, YN; Han, Z; Li, W; Li, W (reprint author), Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China.
2016-12-01
发表期刊2D MATERIALS
ISSN2053-1583
卷号3期号:4
摘要Tungsten ditelluride (WTe2) has attracted increasing attention due to its large magnetoresistance and pressure-induced superconductivity. In this work, we investigate the thermal conductivity (kappa) of monolayer WTe2 by performing first-principles calculations, and find strong anisotropic kappa with predicted room-temperature values of 9 and 20 W m(-1) K-1 along two principal lattice directions, respectively. Such strong anisotropy suggests the importance of orientation when engineering thermal-related applications based on WTe2. The anisotropy of. is attributed to the in-plane linear acoustic phonon branches, while the out-of-plane quadratic acoustic phonon branch is almost isotropic. The size dependence of kappa shows that the size effect can persists up to 10 mu m, and the anisotropy decreases with decreasing sample size due to the suppression of low-frequency anisotropic phonons by boundary scattering.
部门归属[ma, jinlong ; chen, yani ; li, wu] shenzhen univ, inst adv study, shenzhen 518060, peoples r china ; [ma, jinlong ; chen, yani] minist educ, key lab optoelect devices & syst, shenzhen 518060, peoples r china ; [ma, jinlong ; chen, yani] shenzhen univ, coll optoelect engn, shenzhen 518060, guangdong, peoples r china ; [han, zheng] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china ; [han, zheng] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china
关键词Monolayer Wte2 Thermal Conductivity Anisotropy
学科领域Materials Science, Multidisciplinary
资助者National Natural Science Foundation of China [11504385]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/76170
专题中国科学院金属研究所
通讯作者Li, W (reprint author), Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China.
推荐引用方式
GB/T 7714
Ma, JL,Chen, YN,Han, Z,et al. Strong anisotropic thermal conductivity of monolayer WTe2[J]. 2D MATERIALS,2016,3(4).
APA Ma, JL,Chen, YN,Han, Z,Li, W,&Li, W .(2016).Strong anisotropic thermal conductivity of monolayer WTe2.2D MATERIALS,3(4).
MLA Ma, JL,et al."Strong anisotropic thermal conductivity of monolayer WTe2".2D MATERIALS 3.4(2016).
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