Recently, kagome materials have become an engrossing platform to study the interplay among symmetry, magnetism, topology, and electron correlation. The latest works on RMn6Sn6 (R = rare earth metal) compounds have illustrated that this family could be intriguing to investigate various physical phenomena due to large spin-orbit coupling and strong magnetic ordering. However, combined transport and spectroscopic studies in RMn6Sn6 materials are still limited. Here, we report magnetic, magneto-transport, and angle-resolved photoemission spectroscopy measurements of a kagome magnet ErMn6Sn6 that undergoes antiferromagnetic (TN = 345 K) to ferrimagnetic (TC = 68 K) phase transitions in the presence of field. We observe large anomalous and topological Hall effects serving as transport signatures of the nontrivial Berry curvature. The isothermal magnetization exhibits strong anisotropic nature and the topological Hall effect of the compound depends on the critical field of metamagnetic transition. Our spectroscopic results complemented by theoretical calculations show the multi-orbital kagome fermiology. This work provides new insight into the tunability and interplay of topology and magnetism in a kagome magnet.
@article{arxiv.2110.06012,
title = {Anisotropically large anomalous and topological Hall effect in a kagome magnet},
author = {Gyanendra Dhakal and Fairoja Cheenicode Kabeer and Arjun K. Pathak and Firoza Kabir and Narayan Poudel and Randall Filippone and Jacob Casey and Anup Pradhan Sakhya and Sabin Regmi and Christopher Sims and Klauss Dimitri and Pietro Manfrinetti and Krzysztof Gofryk and Peter M. Oppeneer and Madhab Neupane},
journal= {arXiv preprint arXiv:2110.06012},
year = {2021}
}
Comments
18 pages, 18 figures; Supplementary Information included, To be published in PRB