Deep-center hopping conduction in GaN
- 1 September 1996
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 80 (5) , 2960-2963
- https://doi.org/10.1063/1.363128
Abstract
Molecular‐beam‐epitaxial GaN layers change from strongly conductive (ρ≂10−2 Ω cm at 300 K) to semi‐insulating (ρ≂106 Ω cm) as the N flux is increased. Layers grown at low fluxes show strong n‐type conduction, with transport in the conduction band at high temperatures and in a shallow donor band at low temperatures. For layers grown at high N fluxes, the Hall coefficients become too small to measure, suggesting hopping conduction among deep centers. The temperature‐dependent resistivity data are most consistent with multiphonon, rather than single‐phonon, hopping.This publication has 22 references indexed in Scilit:
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