Giant anomalous Nernst signal in the antiferromagnet YbMnBi2

Pan, Yu; Le, Congcong; He, Bin; Watzman, Sarah J.; Yao, Mengyu; Gooth, Johannes; Heremans, Joseph P.; Sun, Yan; Felser, Claudia

doi:10.1038/s41563-021-01149-2

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Giant anomalous Nernst signal in the antiferromagnet YbMnBi₂

MPS-Authors

/persons/resource/persons230813

Pan, Yu
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons247116

Le, Congcong
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons255336

He, Bin
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons225886

Watzman, Sarah J.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons242602

Yao, Mengyu
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons220347

Gooth, Johannes
Nanostructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons179670

Sun, Yan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser, Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Pan, Y., Le, C., He, B., Watzman, S. J., Yao, M., Gooth, J., et al. (2022). Giant anomalous Nernst signal in the antiferromagnet YbMnBi₂. Nature Materials, 21, 203-209. doi:10.1038/s41563-021-01149-2.

Cite as: https://hdl.handle.net/21.11116/0000-0009-9E9E-4

Abstract

A large anomalous Nernst effect (ANE) is crucial for thermoelectric energy conversion applications because the associated unique transverse geometry facilitates module fabrication. Topological ferromagnets with large Berry curvatures show large AN Es; however, they face drawbacks such as strong magnetic disturbances and low mobility due to high magnetization. Herein, we demonstrate that YbMnBi2, a canted antiferromagnet, has a large ANE conductivity of similar to 10 A m(-1) K-1 that surpasses large values observed in other ferromagnets (3-5 A m(-1) K-1). The canted spin structure of Mn guarantees a non-zero Berry curvature, but generates only a weak magnetization three orders of magnitude lower than that of general ferromagnets. The heavy Bi with a large spin-orbit coupling enables a large ANE and low thermal conductivity, whereas its highly dispersive P-x/y orbitals ensure low resistivity. The high anomalous transverse thermoelectric performance and extremely small magnetization make YbMnBi2 an excellent candidate for transverse thermoelectrics.