Fig. 2: Field-tuning axial Higgs modes.
From: Magnetic field control over the axial character of Higgs modes in charge-density wave compounds
a As-measured Raman spectra of GdTe3 collected at T = 2 K in parallel (top panel) and crossed (bottom panel) polarization at 0 T and at + 7 T. Arrows mark the Higgs-type amplitude modes of the CDW phase. The asterisks mark zone-folded phonons that couple to the CDW. b Integrated intensity of the amplitude mode at 9.1 meV as a function of polarization direction within the ac-plane at various fields in parallel (top panel) and crossed (bottom panel) polarization. Dashed gray lines denote the polarization direction with respect to the crystallographic axes.
