Enhanced Anomalous Nernst Effect by Tuning the Chemical Potential in the Topological Kagome Ferromagnet Fe3Sn2
Enhanced Anomalous Nernst Effect by Tuning the Chemical Potential in the Topological Kagome Ferromagnet Fe3Sn2
复制标题
通过调节拓扑 Kagome 铁磁体 Fe3Sn2 中的化学势增强反常能斯特效应
DOI：
10.1103/physrevapplied.19.014026
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发表时间：
2023
影响因子：
4.6
通讯作者：
Zhu-An Xu
中科院分区：
文献类型：
--
作者：
Yupeng Li;Jingang Zhou;Miaocong Li;Lei Qiao;Chenxi Jiang;Qiming Chen;Yuke Li;Qian Tao;Zhu-An Xu
Large anomalous Nernst effect (ANE) in magnetic topological materials (MTMs) has attracted various attentions because of its potential thermoelectric applications. Recently, MTMs with the kagome lattice have become a focus of research to investigate enhanced ANE. In this work, the ANE () at room temperature in a kagome ferromagnetwith massive Dirac bands is greatly enhanced towhen its Fermi level is gradually tuned to Dirac nodal points. Then the intrinsic contributions to the enhancedis further investigated. The anomalous transverse Peltier conductivityshows the linear temperature-dependent behavior, which is consistent with Berry-curvature-contributed, and this behavior is different from temperature-dependent variation of magnetization. Combined with theoretic calculations, theandratio increases significantly when approaching the massive Dirac cone, indicating that the massive Dirac dispersion and intrinsic contributions play a role in enhanced ANE instead of the side-jump mechanism. Our work demonstrates an effective universal approach to enhance ANE in such MTMs.
