MAGNETOLUMINESCENCE SPECTROSCOPIC INVESTIGATIONS IN HG0.7CD0.3TE HE0.15CD0.85TE SUPERLATTICES/

We present the first magnetoluminescence study in the Voigt and Farada y configurations of mercury-containing superlattices (st). In the Fara day configuration, the photoluminescence (PL) peak positions consist o f the lowest allowed transitions between the conduction and heavy-hole valence bands after taking into account the masses as determined by m easurements of the temperature-dependent SdH effect. Coulomb enhanceme nt causes a modification of the magnetoluminescence data. The spontane ous emission intensity shows only a weak magnetic field dependence for moderate and high excitation levels. In the Voigt configuration, the pi peak positions are independent of the magnetic field due to the sig nificantly increased masses parallel to the growth direction. The spon taneous emission intensity shows a step-like behaviour in the magnetic field for moderate excitation levels. This is attributed to changes i n the spontaneous emission intensity perpendicular to the st plane whe n the cyclotron diameter becomes equal to the thickness of one or two coupled wells.