Independently Tunable Coupled Electron Quantum Layers

摘要

In the recent years, coupled electron quantum layers have gained considerable theoretical and experimental attention due to the existence of various new interesting phenomena. In the present work, we investigate the effects of independently tunable layer density on pair-correlation function of coupled electron layers at zero-temperature and zero-magnetic field. The quantum or dynamical version of self-consistent mean-field approximation of Singwi, Tosi, Land and Sjoelander (qSTLS) is used to study the intra- and interlayer pair-correlation functions, g_(ll)(r) and g_(12)(r), over a wide range of density parameter r_(sl) and interlayer spacing d. The pronounced oscillatory behaviour in g_(22)(r) has been found at critical density with sufficiently lower interlayer spacing d. To find the resultant effects of independently tunable layer density on the intra- and interlayer pair-correlation functions, we have compared our results with that of the recent coupled electron quantum layers with equal density and isolated single electron layer.