II 型 Weyl 半金属 WTe2 的特性、合成和热力学综述。,Materials

当前位置： X-MOL 学术 › Materials › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

II 型 Weyl 半金属 WTe2 的特性、合成和热力学综述。
Materials ( IF 3.1 ) Pub Date : 2018-07-10 , DOI: 10.3390/ma11071185
Wenchao Tian ₁ , Wenbo Yu ₁ , Xiaohan Liu ₁ , Yongkun Wang ₁ , Jing Shi ₁

Affiliation

WTe2 作为过渡金属二硫属化物（TMD）的候选者表现出许多优异的性能，例如不饱和大磁阻（MR）。首先介绍了WTe2的晶体结构和特性，并对合成方法进行了总结。由于研究不足，其热力学性质凸显。最后进行了全面的分析和讨论，解读了其优势、挑战和未来前景。部分结果如下所示。(1) 手性反常、压力诱导电导率和不饱和大磁流变等都是WTe2独特的性质，受到广泛关注，同时它也是一种很有前途的热电材料，具有各向异性的超低导热系数(0.46 W·m) −1·K−1)。由于原子质量重和德拜温度低，WTe2 预计具有最低的热导率。(2)合成方法对性能影响较大。虽然可以通过多种方法获得大尺寸、高质量的少层WTe2，但其制备尚未实现工业化，这限制了其应用。(3) WTe2 的热力学性质受温度、尺度和晶格取向的影响。然而，在实验中无法观察到面内各向异性，因为缺陷和边界散射抑制了本征特性。总体而言，这项工作为开发 WTe2 应用提供了机会。

"点击查看英文标题和摘要"

A Review of the Characteristics, Synthesis, and Thermodynamics of Type-II Weyl Semimetal WTe₂.

WTe₂ as a candidate of transition metal dichalcogenides (TMDs) exhibits many excellent properties, such as non-saturable large magnetoresistance (MR). Firstly, the crystal structure and characteristics of WTe₂ are introduced, followed by a summary of the synthesis methods. Its thermodynamic properties are highlighted due to the insufficient research. Finally, a comprehensive analysis and discussion are introduced to interpret the advantages, challenges, and future prospects. Some results are shown as follows. (1) The chiral anomaly, pressure-induced conductivity, and non-saturable large MR are all unique properties of WTe₂ that attract wide attention, but it is also a promising thermoelectric material that holds anisotropic ultra-low thermal conductivity (0.46 W·m−1·K−1). WTe₂ is expected to have the lowest thermal conductivity, owing to the heavy atom mass and low Debye temperature. (2) The synthesis methods influence the properties significantly. Although large-scale few-layer WTe₂ in high quality can be obtained by many methods, the preparation has not yet been industrialized, which limits its applications. (3) The thermodynamic properties of WTe₂ are influenced by temperature, scale, and lattice orientations. However, the in-plane anisotropy cannot be observed in the experiment, as the intrinsic property is suppressed by defects and boundary scattering. Overall, this work provides an opportunity to develop the applications of WTe₂.

更新日期：2019-11-01

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文