Figure 5
From: Pressure-induced phase transitions and superconductivity in magnesium carbides

Band structures and Fermi surfaces of distorted structures with respect to the phonon modes. (a–d) the out-of-plane mode, q1 and (e–h) the in-plane mode, q2. Each mode has two band structures and two Fermi surfaces because of the two opposite directions of the corresponding displacements. The structures in (a,c,e,g) with the corresponding phonon mode in the positive direction while the structures in (b,d,f,h) with the corresponding phonon mode in the negative direction. The inset figures in (e,f) show the distorted zGNR by q2.