Analysis of screening effects on interband Auger processes in GaSb

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Abstract
We analyze the dependence of the Auger coefficient of GaSb on the assumed inverse screening length λ. We demonstrate that current experimental values can only be reproduced if λ≂0. We also derive this result theoretically with a general nonequilibrium Green’s function technique and provide a simple intuitive justification. Our accompanying numerical calculations are based on a Monte Carlo integration procedure which enables us to avoid approximations to the Kane-model overlap matrix elements and to Fermi and phase-space factors.