Question

The frequency of the longitudinal optical phonon for equation at the centre of the first Brillouin zone is equation. Calculate the interatomic force constant for this material. (The atomic weight of equation and equation)

29 Jan 2026
Answer :
Word Count : 175
The interatomic force constant (k) is related to the frequency of the optical phonon by the formula for a diatomic linear lattice: [ \omega = \sqrt{\frac{2k}{\mu}} ] where (\mu) is the reduced mass of the ___ _____ ______ _____ __________ _____ ___ _________ ___ ___ __________ _________.
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