Optical fingerprints of the electronic band reconstruction in van der Waals magnetic materials

Abstract

We report a broadband study of the charge dynamics in the van der Waals (vdW) magnetic materials 2H-$M_x$TaS${}_2$ ($M$ = Mn and Co), which span the onset of both long-range antiferromagnetic (AFM) and ferromagnetic (FM) order, depending on the intercalation $M$ and its concentration $x$. We discover a spectral weight ($SW$) shift from high to low energy scales for FM compositions, while reversely $SW$ is removed from low towards high spectral energies for AFM compounds. This maps the related reconstruction of the electronic band structure along the crossover from the FM to AFM order, which restores an occupation balance in the density of states between spin majority and minority bands of the intercalated 3$d$ elements.

5 pages, 2 Figures, Supplementary Material provided by the Journal

References in corpus (7)

• Optical study of the charge-density-wave mechanism in 2$H$-TaS${}_2$ and Na${}_x$TaS${}_2$
• Electronic and magnetic properties of the 2H-NbS${}_2$ intercalated by 3d transition metal atoms
• Electrical and thermal transport in van der Waals magnets 2H-M${}_x$TaS${}_2$ (M = Mn, Co)
• Evidence for the band broadening across the ferromagnetic transition in Cr${}_{1/3}$NbSe${}_2$
• Magnetic critical behavior and anomalous Hall effect in 2H-Co${}_{0.22}$TaS${}_2$ single crystals
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• Broadband optical conductivity of the chiral multifold semimetal PdGa

Cited by in corpus (1)

• Two-Step Electronic Response to Magnetic Ordering in a van der Waals Ferromagnet