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- Title
Exchange-biased topological transverse thermoelectric effects in a Kagome ferrimagnet.
- Authors
Zhang, Heda; Koo, Jahyun; Xu, Chunqiang; Sretenovic, Milos; Yan, Binghai; Ke, Xianglin
- Abstract
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. Kagome metal TbMn6Sn6 was recently discovered to be a ferrimagnetic topological Dirac material. Here, the authors observe anomalous Nernst effect and anomalous thermal Hall effect which exhibit asymmetry with respect to the magnetic field.
- Subjects
THERMOELECTRIC effects; ANOMALOUS Hall effect; NERNST effect; SEMIMETALS; MAGNETIC fields; MOMENTUM space
- Publication
Nature Communications, 2022, Vol 13, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-022-28733-7