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**Unformatted text preview: **eigenvalue (energy) E. Note that in this case, the effective mass of electron in InGaAs and InAlAs is different. a ‐ b InGaAs (m 1 ) InAlAs (m 2 ) I II V o 4. This question was created by one of our students in Homework #1. Consider the following XRD pattern for Aluminum (FCC crystal), which is collected using CuK a radiation ( l = 1.540562Å). Please index this pattern and determine the lattice constant. Note that the first number in the parenthesis associated with each peak is the value of 2 θ where θ is the incident angle of the x-ray wrt the diffraction plane. 5. Create our own question related to energy band theory, effective mass, and the concepts of electrons and holes. Provide a solution to your question....

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