材料科学
半金属
凝聚态物理
热电效应
功率因数
塞贝克系数
横截面
热电材料
拓扑(电路)
功率(物理)
物理
光电子学
量子力学
电气工程
带隙
工程类
结构工程
作者
Shuai Wu,Xincan Wang,Xinrun Mi,Sikang Zheng,Kai Yang,Zhan Zhou,Honghui Wang,Guang Han,Xu Lu,Yu Pan,Guoyu Wang,Xiaoyuan Zhou
标识
DOI:10.1002/aenm.202400184
摘要
Abstract The distinctive properties of topological semimetals, including linear band dispersion and compensated electron‐hole carriers, have positioned these materials at the forefront of research in power generation and solid‐state cooling due to their remarkable magneto‐thermoelectric performance. In this work, the transverse thermoelectric characteristics of the topological semimetal NbAs 2 are studied. Specifically, under a magnetic field of 9 T, the Nernst coefficient displays a linear and unsaturated trend, reaching a peak of 600 µV K −1 at 35 K. Consequently, this engenders a substantial transverse power factor (tPF) of 850 µW cm −1 K −2 under a 5 T magnetic field. The exceptional attributes of NbAs 2 driven by its remarkably high carrier mobility and compensated electron‐hole concentration near the Fermi level are revealed by band structure analysis based on theoretical calculations and quantum oscillations. This work not only underscores the immense potential of topological semimetals as transverse thermoelectric materials for niche applications where magnetic fields exist but also provides valuable guidance for the discovery and optimization of topological materials for promising thermoelectric performance.
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