Figure 1
From: Magnon gap excitations in van der Waals antiferromagnet MnPSe3
(a) The magnetic structure of MnPSe\(_3\) in the antiferromagnetic phase. The grey sphere and red arrow represent Mn\(^{2+}\) ion and spin direction respectively. The figure is created using the VESTA software package23. (b) Raman spectra of MnPSe\(_3\) measured at some selected temperatures. M\(_+\) resonance corresponds to the upper magnon gap excitation. Spectra are shifted vertically for clarity. Black triangles mark the peak energy \(w_{M+}\) of M\(_+\) resonance. The shaded region indicates the spectral range blocked by filtering of the laser stray light. As illustrated in the inset, the \(w_{M+}\) dependence on temperature follows a conventional formula for the antiferromagnets (see the text) as shown with the solid line.
