6. Optical phonon and acoustic phonon: (a) Draw the dispersion curves for a diatomic linear chain in the first brillouin

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6. Optical phonon and acoustic phonon: (a) Draw the dispersion curves for a diatomic linear chain in the first brillouin

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6 Optical Phonon And Acoustic Phonon A Draw The Dispersion Curves For A Diatomic Linear Chain In The First Brillouin 1
6 Optical Phonon And Acoustic Phonon A Draw The Dispersion Curves For A Diatomic Linear Chain In The First Brillouin 1 (21.12 KiB) Viewed 35 times
6. Optical phonon and acoustic phonon: (a) Draw the dispersion curves for a diatomic linear chain in the first brillouin zone. (b) How do the atoms vibrate at the zone boundary in each branch? (c) What if the two different kinds of atoms have an identical mass? (d) If the primitive unit cell has 5 different atoms, how many longitudinal acoustic branches, transverse acoustic branches, longitudinal optical and transverse optical branches?
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