Fig. 3: Phonons of the pentagon–heptagon Stone–Wales defect in hexagonal boron nitride.
From: Stone–Wales defects in hexagonal boron nitride as ultraviolet emitters
a Calculated phonon density of states for the pristine (red curve) and defective (black curve) hexagonal boron nitride. The phonons were calculated in the Γ-point of the applied supercell. The position of the (quasi)local phonon modes are highlighted by circles and arrows. The motion of ions in the highest energy (quasi)local phonon modes at b 206 meV and c 149 meV. The length of the arrows represents the relative amplitude of the motion of the ions where larger scale was applied for c for the sake of visibility.
