SPIN SPLITTING IN A 2D HOLE SYSTEM UNDER UNIAXIAL COMPRESSION

Magnetotransport experiments under in-plane [110] uniaxial compression up to 2.4 kbar of a (001) D-GaAs/Al0.5Ga0.5As single heterostructure have been performed. A pronounced redistribution of carriers in the sp in-split lowest heavy hole subband in favour of the less populated and lighter mass one is established but tile total carrier concentration reveals only a 5% decrease. The difference between the effective masse s in spin subbands becomes less. The spin subband splitting decreases by a factor of 2.5 under maximum compression.