SPIN-ORBIT INTERACTION IN A 2-DIMENSIONAL ELECTRON-GAS IN A INAS ALSBQUANTUM-WELL WITH GATE-CONTROLLED ELECTRON-DENSITY/

We present experiments on the tuning of the spin-orbit interaction in a two-dimensional electron gas in an asymmetric InAs/AlSb quantum well using a gate. The observed dependence of the spin splitting energy on the electron density can be attributed solely to the change in the Fe rmi wave vector. The spin-orbit interaction parameter (alpha approxima te to 0.6X10(-11) eV m) as such does not change significantly with ele ctron density. [S0163-1829(98)07116-1].