We show that a recent psuedopotential calculation overestimates the temperature dependence of the band gap in GaAs. We also calculate the individual contributions of the pseudopotential coefficients to the shift with temperature and find that the theoretical shift is dominated by $V_{11}^s$. Hence the disagreement between theory and experiment may result from the arbitrary truncation of the pseudopotential for $G^2>11\mathrm{}$.

Close

PrevNext

View figure in article