Figure 4
From: Multiferroic Behavior in Elemental Selenium below 40 K: Effect of Electronic Topology
(a) A plot of the temperature dependence of the (normalized) area under the respective spectral response functions shows that the magnon mode response drops sharply near the magnetic transition temperature (30–50 K), while the phonon mode is partially damped. (b) Shift in the magnon mode frequencies (M1 and M2) with applied dc electric field, recorded at 4 K. The phonon frequency shows very little field dependence. (c) Temperature dependence of the capacitance (dielectric response) in zero magnetic field (red dots, upper curve) and in an applied magnetic field of 2 T (open circles, lower curve) confirms magnetoelectric coupling.
