MAGNETOOPTICAL STUDY OF THE EXCHANGE INTERACTION IN (CD,MN)TE UNDER HIGH HYDROSTATIC-PRESSURE

We report on magneto-optical studies of a CdTe/Cd0.91Mn0.09Te single-q uantum-well (SQW) structure with different quantum-well (QW) widths un der high hydrostatic pressure at low temperatures. From the Zeeman spl itting of the barrier and QW states as a function of pressure we deriv e the pressure dependence of the antiferromagnetic (AF) exchange const ant N-0 beta and of the phenomenological constant T-0 (AF temperature) . The observations can be understood in terms of the distance dependen ce of the hopping matrix element V-pd between the 3d(5)-levels of the Mn2+ ions and the valence-band (VB) p-orbitals.