Confined-phonon effects in the band-gap renormalization of semiconductor quantum wires
Bennett, C. R.
Physical Review B - Condensed Matter and Materials Physics
American Physical Society
3994 - 3999
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We calculate the band-gap renormalization in quasi-one-dimensional semiconductor quantum wires including carrier-carrier and carrier-phonon interactions. We use the quasistatic approximation to obtain the self-energies at the band edge that define the band-gap renormalization. The random-phase approximation at finite temperature is employed to describe the screening effects. We find that confined LO-phonon modes through their interaction with the electrons and holes modify the band gap significantly and produce a larger value than the static ∈0 approximation.