Enhanced Anomalous Nernst Effect in the Ferromagnetic Kondo Lattice CeCo 2 As 2
Abstract
The anomalous Nernst effect (ANE), generating a voltage perpendicular to a temperature gradient due to magnetization, is closely linked to the Berry curvature (BC) near the Fermi energy in topological magnets. We report an enhanced spontaneous ANE in the ferromagnetic Kondo lattice CeCo_{2}As_{2}, which features Kondo-screened cerium-based 4f moments embedded in a ferromagnetic d-electron framework. The observed large anomalous Nernst coefficient, greater than the Seebeck coefficient, is attributed to the strong BC present in the f-orbital-dominated flat bands. The enhanced ANE in CeCo_{2}As_{2} serves as a signature of the Fermi energy pinning within the topological flat band, highlighting the correlation-driven topology in the Kondo lattice.
Fields of Study & Subjects
Rare-earth and actinide compounds
Topological Materials and Phenomena
Iron-based superconductors research
Publication details
- Journal / source
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Volume
- 136
- Issue
- 3
- Pages
- 036505–036505
- Publication date
- 2 January 2026
- Language
- EN