Magneto-optical spectroscopy of gated p-doped CdMnTe quantum wells
Abstract
We describe the magneto-photoluminescence of (Cd,Mn)Te/(Cd,Zn,Mg)Te quantum wells containing a 2D hole gas . The hole population can be tuned either optically in p-i-p structures, by above barrier illumination, or electrically by applying a bias voltage of a few volts on a p-i-n structure. We identify the photoluminescence at low field as due to the positively charged exciton X+, which is destabilized at a given value of the Zeeman splitting, due to its crossing with a state involving a triplet configuration of the trion hole pair. The X+ looses its intensity in favor of a double line which exhibits features associated to band-to-band transitions at k = 0 and k = kF (wave vector at Fermi energy).
- Publication:
-
Physica Status Solidi B Basic Research
- Pub Date:
- February 2004
- DOI:
- 10.1002/pssb.200304222
- Bibcode:
- 2004PSSBR.241..718B
- Keywords:
-
- 71.35.-y;
- 71.55.Gs;
- 73.21.Fg;
- 75.30.Hx;
- 75.50.Pp