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Find an absorption-vs-photon energy data from literature and apply the procedures to find if the material is an indirect gap or a direct gap material.

Find an absorption-vs-photon energy data from literature and apply the procedures to find if the material is an indirect gap or a direct gap material. Find the energy of the gap and the phonon energy required (if the material is an indirect gap material). Show your formulation and analysis.

If you choose material having direct transition, that would be perfect.


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