Correlation effects in double quantum-well systems

Publisher Website
Google Scholar
Abstract
An interacting double-layer electron system, with uniform positive backgrounds, is considered at finite temperatures and in the presence of a strong perpendicular magnetic field for integer filling factors. The low-energy physics of this system is described using an effective action formalism. The density-density correlation functions and the long-wavelength collective excitations of the electronic system (magnetoplasmons) are obtained. The results are valid beyond the random-phase approximation. Finally, the response of the system to electromagnetic interactions is considered and the current induced in one layer (transconductivity), when a current is driven only through the other layer, is evaluated. All results take into account explicitly interlayer and intralayer correlations.