Superfluidity of electron-hole pairs in randomly inhomogeneous bilayer systems

Abstract

In bilayer systems electron-hole (e-h) pairs with spatially separated components (i.e., with electrons in one layer and holes in the other) can be condensed to a superfluid state when the temperature is lowered. This article deals with the influence of randomly distributed inhomogeneities on the superfluid properties of such bilayer systems in a strong perpendicular magnetic field. Ionized impurities and roughenings of the conducting layers are shown to decrease the superfluid current density of the e-h pairs. When the interlayer distance is smaller than or close to the magnetic length, the fluctuations of the interlayer distance considerably reduce the superfluid transition temperature.

13 pages, 3 figures

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Cited by in corpus (3)

• Superfluidity of a rarefied gas of electron-hole pairs in a bilayer system
• Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states
• Current noise and higher order fluctuations in semiconducting bilayer systems