Exchange-Driven Bilayer-to-Monolayer Charge Transfer in an Asymmetric Double-Quantum-Well
We present data which shows for the first time that an exchange-driven bilayer-to-monolayer transition occurs in an externally biased double quantum well system at B=0 as the total carrier density is increased. This transition is due to the negative compressibility of the low density carrier systems and the layer imbalance caused by external gate biases.
Hamiltona, A. R.; Simmons, M. Y.; Hanna, Charles B.; Díaz-Vélez, J. C.; Pepper, M.; and Ritchie, D. A.. (2002). "Exchange-Driven Bilayer-to-Monolayer Charge Transfer in an Asymmetric Double-Quantum-Well". Physica E: Low-Dimensional Systems and Nanostructures, 12(1-4), 304-306.