Independently Tunable Coupled Electron Quantum Layers

Abstract

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 Sjölander (qSTLS) is used to study the intralayer and interlayer pair-correlation functions, gll(r) and g12(r), over a wide range of density parameter rsl and interlayer spacing d. The pronounced oscillatory behaviour in g22(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 intralayer and interlayer pair-correlation functions, we have compared our results with that of the recent dependently tunable coupled electron quantum layers and single electron quantum layer.