High-field magnetoabsorption study of heterointerface effects in CdTe/Cd0.6Mn0.4Te multiple quantum wells

We investigated the magnetic-field dependence of the excitonic absorption spectra originating from quantized levels (n=1 and 2) of CdTe/${\mathrm{Cd}}_{0.6}$ ${\mathrm{Mn}}_{0.4}$Te multiple quantum wells in pulsed high magnetic fields up to 40 T. We observed the large Zeeman splitting of the heavy-hole exciton in the dependence of the absorption peak energies. The magnetic-field and the quantum-well-thickness dependences of the Zeeman splittings are explained by considering the heterointerface effect related to frustrated antiferromagnetism, in addition to the effect of the excitonic wave function penetrating into the ${\mathrm{Cd}}_{0.6}$ ${\mathrm{Mn}}_{0.4}$Te barrier layer previously reported.