Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy
Figure 2
Schematic of MnO5 bipyramid above and below , respectively. (a) Centrosymmetric structure with space group /mmc and (b) noncentrosymmetric with cm space group. The arrows indicate atomic displacements with respect to the centrosymmetric structure [14, 30]. (Red: Re, blue: O, yellow: Mn).
