Modulation-doped quantum-well wires: Ground-state properties

Self-consistent calculations of the potential, wave functions, and subband structure of modulation-doped multiple-quantum wires are presented. The model parameters are chosen so as to descibe recently fabricated quantum wires where clear evidence of one-dimensional behavior has been found. Quite good agreement with experimental data is obtained when a distribution of negatively charged centers (presumably induced by the ion milling in the real samples) is included. Exchange and correlation corrections on the Hartree approximation are included within the local-density formalism and found to renormalize the intersubband splittings by a fraction of a meV.