What explains the existence of two energies within Tauc and Urbach ranges instead of one for each range? Two energies for the same optical transition?

15 July 2021 1 8K Report

What explains the existence of two energies within Tauc and Urbach ranges instead of one for each range?

Two energies for the same optical transition. Namely, two energies within the Tauc range and two energies within the Urbach range.

Knowing that the incident optical transition is an allowed direct transition.

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