TY - JOUR T1 - Fermi-energy edge singularity and excitonic enhancement associated with the second subband in asymmetric modulation-doped quantum wells JO - Physical Review B PY - 1993/11/15 AU - Fisher TA AU - Simmonds PE AU - Skolnick MS AU - Martin AD AU - Smith RS ED - DO - DOI: 10.1103/physrevb.48.14253 PB - American Physical Society (APS) VL - 48 IS - 19 SP - 14253 EP - 14263 Y2 - 2024/12/22 ER -