Fig. 5: Angle-resolved photoemission across the Cr resonance.
From: The nature of ferromagnetism in the chiral helimagnet Cr1/3NbS2
Angle-resolved photoemission spectra measured below the helimagnetic transition temperature (110 K) using a photon energy tuned a off the Cr L3 resonance (hν = 570 eV), b at the onset of Cr absorption (hν = 574eV) and c at the maximum of Cr absorption (hν = 576 eV), where the contribution due to photon momentum is taken into account. An angle of 60° is made between the polarization vector of the incoming light and the crystal surface plane, resulting in a dominant component perpendicular to the sample surface. d Integrated energy-dispersive curves taken over a momentum range, Δk = ±0.5 Å−1 with respect to Γ, encompassing the α and two β1,2, bands. e Resonant momentum distribution curves obtained by integrating ±50 meV about the Fermi level. For the resonance tuned on the maximum of Cr absorption, a featureless MDC is observed, indicating various scattering channels have opened across the Fermi surface.
