Anisotropic Multi-Q Order in CoxTaS2

2025/07/16 by Kruppe, Jonathon, Rodriguez, Josue, Xu, Catherine +3 · 1 citation
#FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Strongly Correlated Electrons (cond-mat.str-el)

paper · doi:10.48550/arxiv.2507.12588

Abstract

The cobalt-intercalated transition metal dichalcogenide Co_xTaS₂ hosts a rich landscape of magnetic phases that depend sensitively on x. While the stoichiometric compound with x=1/3 exhibits a single magnetic transition, samples with x≤ 0.325 display two transitions with an anomalous Hall effect (AHE) emerging in the lower temperature phase. Here, we resolve the spin structure in each phase by employing a suite of magneto-optical probes that include the discovery of anomalous magneto-birefringence -- a spontaneous time-reversal sensitive rotation of the principal optic axes. A symmetry-based analysis identifies the AHE-active phase as an anisotropic (2+1)Q state, in which magnetic modulation at one wavevector (Q) differs in symmetry from that at the remaining two. The (2+1)Q state naturally exhibits scalar spin chirality as a mechanism for the AHE and expands the classification of multi-Q magnetic phases.

Citations

• Tunable chiral and nematic states in the triple-Q antiferromagnet Co_1/3TaS₂
• Nonvolatile Nematic Order Manipulated by Strain and Magnetic Field in a Layered Antiferromagnet
• Designing Flat Bands, Localized and Itinerant States in TaS2 Trilayer Heterostructures
• Defect-induced spin textures in magnetic solids
• Spin dynamics of triple-Q magnetic orderings in a triangular lattice: Implications for multi-Q orderings in general two-dimensional lattices
• Altermagnetism Classification
• Electrical control of topological 3Q state in intercalated van der Waals antiferromagnet Cox-TaS2
• d-Wave Hall effect and linear magnetoconductivity in metallic collinear antiferromagnets
• Linear magneto-conductivity as a DC probe of time-reversal symmetry breaking
• Unified Theory of the Anomalous and Topological Hall Effects with Phase Space Berry Curvatures
• Long-range, Non-local Switching of Spin Textures in a Frustrated Antiferromagnet
• Intrinsic Second-Order Anomalous Hall Effect and Its Application in Compensated Antiferromagnets
• Anomalous Hall antiferromagnets
• Highly tunable magnetic phases in transition metal dichalcogenide Fe_1/3+δNbS₂

Cited by

• Domain wall induced topological Hall effect in the chiral-lattice ferromagnet Fe_xTaS₂

Related

• Tunable chiral and nematic states in the triple-Q antiferromagnet Co_1/3TaS₂
• Large anomalous Hall effect in layered antiferromagnet Co_0.29TaS₂
• Experimental confirmation of the magnetic ordering transition induced by an electronic structure change in the metallic triangular antiferromagnet Co_1/3TaS₂
• Understanding the Anomalous Hall effect in Co_1/3NbS₂ from crystal and magnetic structures
• Electrical control of topological 3Q state in intercalated van der Waals antiferromagnet Cox-TaS2