The group velocity for the vibration waves at the boundary of the Brillouin zone is Select one: a. proportional related to k2 b. zero c. inverse related to k d. proportional related to k

Q: (ms) 5 7 I 13 15 17 a) %50 b) %30 c) %40 d) %35 e)O %45

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Q: Try to draw the the band structure from M to X in the 1st Brillouin zone for single cubic structure.

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