Anomalous Hall and Nernst effects in epitaxial films of topological kagome magnet Fe3Sn2
Abstract
The topological kagome magnet (TKM) Fe3Sn2 exhibits unusual topological properties, flat electronic bands, and chiral spin textures, making it an exquisite materials platform to explore the interplay between topological band structure, strong electron correlations, and magnetism. Here we report the synthesis of high-quality epitaxial (0001) Fe3Sn2 films with large intrinsic anomalous Hall effect close to that measured in bulk single crystals. In addition, we measured a large, anisotropic anomalous Nernst coefficient Sy x of 1.26 μ V K-1 , roughly 2-5 times greater than that of common ferromagnets, suggesting the presence of Berry curvature sources near the Fermi level in this system. Crucially, the realization of high-quality Fe3Sn2 films opens the door to explore emergent interfacial physics and create novel spintronic devices based on TKMs by interfacing Fe3Sn2 with other quantum materials and by nanostructure patterning.
- Publication:
-
Physical Review Materials
- Pub Date:
- August 2020
- DOI:
- 10.1103/PhysRevMaterials.4.084203
- arXiv:
- arXiv:2008.02202
- Bibcode:
- 2020PhRvM...4h4203K
- Keywords:
-
- Condensed Matter - Materials Science;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- accepted by Physical Review Materials