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Zusammenfassung:
An effective field theoretic description of (Formula presented) bilayer electron systems stabilized by Coulomb repulsion in a single wide quantum well is examined using renormalization-group techniques. The system is found to undergo a crossover from a low temperature strongly correlated quantum Hall state to a high-temperature compressible state. This picture is used to account for the recent experimental observation of an anomalous transition in bilayer electron systems [T. S. Lay et al., Phys. Rev. B 50, 17 725 (1994)]. An estimate for the crossover temperature is provided, and it is shown that its dependence on electron density is in reasonable agreement with the experiment. © 2000 The American Physical Society.
