  The structural, electronic, dielectric and vibrational properties of
zinc-blende (ZB) InAs were studied within the framework of density functional
theory (DFT) by employing local density approximation and norm-conserving
pseudopotentials. The optimal lattice parameter, direct band gap, static
dielectric constant, phonon frequencies and Born effective charges calculated
by treating In-4d electrons as valence states are in satisfactory agreement
with other reported theoretical and experimental findings. The calculated band
gap is reasonably accurate and improved in comparison to other findings.
