INTERLAYER CHARGE-TRANSFER IN DOUBLE-QUANTUM-WELL SYSTEMS

As the front-layer density in a bilayer electron or hole system is dep leted by the application of a biased front gate, the density in the ba ck layer increases due to the exchange term in the energy. For the sam ple parameters we studied, a self-consistent calculation using the loc al-density approximation predicts a discontinuous charge transfer that is not observed experimentally. We discuss possible origins of this d iscrepancy.