“…(10b, 13b, 13c, 15b, 15c) are evaluated by applying equation of motion technique of quantum dynamics to find the newly Fourier transformed phonon Green function G kk (ε) as [13,34,47,48,50]: (16) can be obtained again by using equation of motion technique of quantum dynamics [13,34,47,48,50] and they are substituted in Eq. (16) …”