bands. ∑n. (ψn|r|ψn). ≡. 2ei. (2π). 3 occ. bands. ∑n ∫BZ dk (unk|∇k|unk). −Pel. = Ω−1 ∫ drrρ(r) ionic electronic … Semiconductor alloys. (InGa)N. (InGaAl)P. Login to Download