论文标题
kagome ferrimagnet中的交换偏向拓扑横向热电效应
Exchange-biased topological transverse thermoelectric effects in a Kagome ferrimagnet
论文作者
论文摘要
kagome金属TBMN6SN6最近通过扫描隧道显微镜/光谱测量值发现是铁磁性拓扑狄拉克材料。在这里，我们报告了这种化合物中大型异常的Nernst效应和异常热室效应的观察。异常的横向转运与3D动量空间中巨大的DIRAC间隙的浆果曲率贡献一致，如我们的第一原理计算所证明的那样。此外，横向热电传输相对于所施加的磁场表现出不对称性，即交换偏置行为。这些功能共同将TBMN6SN6作为基于异常Nernst效果的出色热电性能的有前途的系统。
Kagome metal TbMn6Sn6 was recently discovered to be a ferrimagnetic topological Dirac material by scanning tunneling microscopy/spectroscopy measurements. Here, we report the observation of large anomalous Nernst effect and anomalous thermal Hall effect in this compound. The anomalous transverse transport is consistent with the Berry curvature contribution from the massive Dirac gaps in the 3D momentum space as demonstrated by our first-principles calculations. Furthermore, the transverse thermoelectric transport exhibits asymmetry with respect to the applied magnetic field, i.e., an exchange-bias behavior. Together, these features place TbMn6Sn6 as a promising system for the outstanding thermoelectric performance based on anomalous Nernst effect.
