Electron and hole g-factors in CdTe/CdMgTe quantum wells

Single CdTe/CdMgTe quantum well (QW) structures are investigated by stationary and time-resolved photoluminescence in the presence of an applied magnetic field. We study the dependence of the electron and the hole g factors on the well width by combining Zeeman measurements and the recently developed spin quantum beats technique. The experimental results show that both the electron and the hole g factors have the same sign in wide QWs and increase with decreasing well width. The electron spin phase relaxation time is about 250 ps in our QW structures.