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Multiple Scattering Theory and Pseudogaps in Amorphous Covalent Semiconductors

✍ Scribed by W. John

Publisher
John Wiley and Sons
Year
1973
Tongue
English
Weight
453 KB
Volume
55
Category
Article
ISSN
0370-1972

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✦ Synopsis

Abstract

The electronic density of states of amorphous covalent semiconductors is investigated using the multiple scattering theory of nonoverlapping muffin‐tin potentials. In the nearest neighbour approximation an expression is derived for the density of states which relates it to the density of states of a simple tight‐binding Hamiltonian. Numerical calculations for amorphous sps‐bonded C and amorphous Si show the existence of a pseudogap which is determinated by short‐range order.

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✍ B. Esser 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 800 KB

## Abstract The time‐dependent moments of a luminescence band due to radiative recombination within electron‐hole pairs localized in band tail states are calculated. Besides the radiative process a competing non‐radiative process by tunneling of the excited electrons (or holes) to defect centres is