Publication
Physical Review B
Paper

Impurity states in a disordered insulator: The Lloyd model

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Abstract

We have calculated the density of states for an exactly soluble model of a charged impurity in a disordered insulator. We find that the states associated with the impurity have the same mean energy as those found in the corresponding crystal, but have a spread in energies determined by the degree of the disorder. These results are compared favorably to results previously obtained for a more realistic model representing charged impurities in a-Si. The results also shed some light on the general nature of the localized states in the gap of an amorphous semiconductor. © 1979 The American Physical Society.

Date

15 Nov 1979

Publication

Physical Review B

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