Abstract
Geometric frustration in the kagome lattice makes it a great host for the flat electronic band, nontrivial topological properties, and novel magnetism. Here, we use magnetotransport measurements to map out the field-temperature phase diagram of the centrosymmetric YMn6Sn6 with a Mn kagome lattice and show that the system exhibits the topological Hall effect (THE) with an in-plane applied magnetic field around 240 K. In addition, our neutron diffraction results demonstrate that the observed THE cannot arise from a magnetic skyrmion lattice, but instead from an in-plane field-induced double-fan spin structure with c-axis components. This paper provides a platform to understand the influence of a field-induced novel magnetic structure on magnetoelectric response in topological kagome metals.
| Original language | English |
|---|---|
| Article number | 014416 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 12 2021 |
Funding
This paper was supported by the Beijing Natural Science Foundation (Grant No. Z200005), the National Key R&D Program of China (Grants No. 2018YFE0202600, 2016YFA0300504), the National Natural Science Foundation of China (No. 11774423, 11822412), the Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China (RUC; 18XNLG14, 19XNLG17). The neutron scattering work at Rice is supported by U.S. NSF-DMR-1700081 and by the Robert A. Welch Foundation under Grant No. C-1839 (P.D.). A portion of this research used resources at the Spallation Neutron Source and the High Flux Isotope Reactor, a DOE Office of Science User Facility operated by ORNL. H.H and S.F were supported by a MEXT Element Strategy Initiative to Form Core Research Center (Grant No. JPMXP0112101001).