The influence of electronic surrounding on phonons is highlighted by large phonon linewidth of discussed modes, shown in Fig. (a) and Fig. where Ek,n and fk,n are energy and occupancy of the n-th band at k-th point, N is a number of unit cells. The phonon frequencies are the eigenvalues of the dynamical matrix normalized by atomic masses. In consequence, the higher value of the EPC matrix leads to lower frequency. As a consequence, the phonon softening and phonon linewidth are associated with each other, as both depend on the EPC matrix and geometry of FS. It is visible in Fig. (a) and 9(a), where the softened modes are characterized by large phonon linewidth.