Abstract
A simple adjusted pseudopotential form factor combined with the virtual crystal approximation and incorporating the compositional disorder as an effective potential for the alloy GaxIn1—xSb has been used in order to calculate the dependence of the direct and indirect band gaps on molar fraction and temperature. The obtained results compare reasonably well with available experimental data. The bowing parameter decreases with increasing temperature. The values of the temperature coefficients are nonlinearly dependent on molar composition and dependent on the temperature range.
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