Anisotropic multi-Q order in CoxTaS2
Source abstract
Abstract
Abstract The cobalt-intercalated transition metal dichalcogenide Co x TaS 2 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.
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Research context
OpenAlex topics: Crystal Structures and Properties · X-ray Diffraction in Crystallography · Solid-state spectroscopy and crystallography
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (58)
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