Question: I3 Problem # 6: a In nearly free electron model what kind of wave function exists for the value of k 10 at zone boundary

Problem # 6: a In nearly free electron model what kind of wave function exists for the value of k 10 at zone boundary justify your answer. Write down the normalized wave function which exists at zone boundary. b Find the magnitude of the energy gap at zone boundary using periodic potential. 10 Explain the concept of effective mass of electrons in the band. Find the expression for it

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