Experimental Realization of Room Temperature Topological Hall Effect in Kagome Antiferromagnet

2021/12/31 by Achintya Low, Low, Achintya, Susanta Kumar Ghosh +3
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Graphene research and applications #Materials Science (cond-mat.mtrl-sci) #Strongly Correlated Electrons (cond-mat.str-el) #Topological Materials and Phenomena

paper · pdf · doi:10.48550/arxiv.2112.15409

openalex publication_date 2021/12/31 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28

Abstract

Magnetic topological semimetals are the manifestations of interplay between electronic and magnetic phases of the matter, leading to peculiar characteristics such as the anomalous Hall effect (AHE) and topological Hall effect (THE). Mn₃Sn is a time-reversal symmetry broken (TRS) magnetic Weyl semimetal showing topological characteristics within the Kagome lattice network. In this study, for the first time, we uncover large and pure topological Hall effect in Mn₃Sn at the room temperature, which is gradually suppressed by Fe doping at the Mn site of Mn_3-xFe_xSn. We further identify that the topological properties of these systems are highly anisotropic. These findings promise the realization of potential topotronic applications at room temperature.

Related

• Room temperature observation of the anomalous in-plane Hall effect in epitaxial thin films of a Weyl ferromagnet
• Separating Intrinsic and Domain-Mediated Anomalous Hall Conductivity in Co₃Sn₂S₂ via Contact Engineering
• Anomalous planar Hall effect in a kagome ferromagnet
• Giant plateau-like topological Hall effect controlled by tailoring the magnetic exchange stiffness in a kagome magnet
• Giant Topological Hall Effect in Magnetic Weyl Metal Mn₂Pd_0.5Ir_0.5Sn