Field-tunable toroidal moment and anomalous Hall effect in noncollinear antiferromagnetic Weyl semimetal Co1/3TaS2

Abstract

Combining magnetism with band topology provides various novel phases that are otherwise impossible. Among several cases, noncollinear metallic antiferromagnets can reveal particularly rich topological physics due to their diverse magnetic ground states. However, there are only a few experimental studies due to the lack of suitable materials, especially with triangular lattice antiferromagnets. Here, we report that metallic triangular antiferromagnet Co1/3TaS2 exhibits a substantial anomalous Hall effect (AHE) related to its noncollinear magnetic order. Our first-principles calculations found that hourglass Weyl fermions from the non-symmorphic symmetry trigger AHE. We further show that AHE in Co1/3TaS2 can be characterized by the toroidal moment, a vortex-like multipole component that arises from a combination of chiral lattice and geometrical frustration. Finally, the unusual field-tunability of the toroidal moment puts Co1/3TaS2 as a rare example of a noncollinear metallic antiferromagnet filled with interesting magnetic and topological properties.

20 pages, 4 figures, Accepted for publication in npj Quantum Materials

References in corpus (6)

• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Cluster multipole theory for anomalous Hall effect in antiferromagnets
• Multipole expansion for magnetic structures: A generation scheme for symmetry-adapted orthonormal basis set in crystallographic point group
• Permutable SOS (Symmetry Operational Similarity)
• Field-tunable toroidal moment in a chiral-lattice magnet
• Hourglass Fermion Surface States in Stacked Topological Insulators with Nonsymmorphic Symmetry

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• Tetrahedral triple-Q magnetic ordering and large spontaneous Hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2
• Composition dependence of bulk properties in the Co-intercalated transition-metal dichalcogenide Co${}_{1/3}$TaS${}_2$
• Large anomalous Hall effect and unusual domain switching in an orthorhombic antiferromagnetic material NbMnP
• Magnetic interactions in intercalated transition metal dichalcogenides: a study based on ab initio model construction
• Consequences and control of multi-scale (dis)order in chiral magnetic textures
• Itinerant A-type Antiferromagnetic Order in Co${}_{0.25}$TaSe${}_2$
• Electrical control of topological 3Q state in intercalated van der Waals antiferromagnet Cox-TaS2
• Robust triple-q magnetic order with trainable spin vorticity in Na${}_2$Co${}_2$TeO${}_6$
• Intrinsic anomalous Hall effect arising from antiferromagnetic structure revealed by high-quality NbMnP
• Spin dynamics of triple-Q magnetic orderings in a triangular lattice: Implications for multi-Q orderings in general two-dimensional lattices
• Large spontaneous Hall effect with flexible domain control in an antiferromagnetic material TaMnP
• Spontaneous Anomalous Hall Effect at Room Temperature in Antiferromagnetic Material NbMnAs
• Double-$Q$ chiral stripe order in the anomalous Hall antiferromagnet CoNb${}_3$S${}_6$
• Correlation-driven origin of shallow electron pocket in Co${}_{1/3}$TaS${}_2$ revealed by ARPES and cluster perturbation theory
• Van der Waals Antiferromagnets: From Early Discoveries to Future Directions in the 2D Limit