Alloying induced degradation of the absorption edge of InAs_{x}Sb_{1-x}

Details Alloying induced degradation of the absorption edge of InAs_{x}Sb_{1-x} Alloying induced degradation of the absorption edge of InAs_{x}Sb_{1-x}

2007-02-22

arxiv.org/abs/cond-mat/0702518v1

Physics

Condensed Matter

Materials Science

3 figures

Scientific paper

InAs_{x}Sb_{1-x} alloys show a strong bowing in the energy gap, the energy gap of the alloy can be less than the gap of the two parent compounds. We demonstrate that a consequence of this alloying is a systematic degradation in the sharpness of the absorption edge. The alloy disorder induced band-tail (Urbach tail) characteristics are quantitatively studied for InAs_{0.05}Sb_{0.95}.

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