Dear PWSCF User's, I am doing phonon calculation of a material having 40 atoms in the unit cell and BCC structure. The phonon frequncy which should be degenerate are not coming out exactly degenerate, like transverse acoustic mode along 100 direction having frequency 0.44579 and 0.54478 Thz while they should have equal frequency. what should be the error which I made kindly suggest me. thanks in Advance.
Mayank gupta BARC
