Dresselhaus spin-orbit interaction in the p -AlGaAs/GaAs/AlGaAs structure with a square quantum well: Surface acoustic wave study

The effect of spin-orbit interaction was studied in a high-quality $p$-AlGaAs/GaAs/AlGaAs structure with square quantum well using acoustic methods. grown on GaAs (100) substrate symmetrically doped carbon both sides the well. Shubnikov--de Haas--type oscillations ac conductance two-dimensional holes were measured. At low magnetic field $B<2$ T, undergo beating induced by interaction. Analysis character made it possible to separate contributions from two heavy-hole subbands split For each values effective masses and relaxation times determined, then energy obtained. profile, as small magnitude interaction, allowed us conclude that splitting is governed Dresselhaus mechanism.