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Published January 31, 1994 | public
Journal Article Open

Many-body integer quantum Hall effect: Evidence for new phase transitions


The ν=1 quantum Hall effect in bilayer 2D electron systems is shown to continuously evolve from a regime dominated by single-particle tunneling into one where interlayer Coulomb interactions stabilize the state. This many-body integer quantum Hall state exhibits a phase transition to a compressible state at large layer separation. We also find evidence for an intriguing and unexpected second transition to a new incompressible state, driven by an in-plane magnetic field. While the origin of this last result is unclear, we discuss a recent model of a pseudospin textural phase transition.

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©1994 The American Physical Society Received 25 October 1993 The authors acknowledge fruitful discussions with Allan MacDonald, Steve Girvin, Song He, and Francis Ezawa. J.P.E. and G.S.B. acknowledge the hospitality of the Aspen Center for Physics.


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August 22, 2023
August 22, 2023