Anomalous Stability of nu=1 Bilayer Quantum Hall State

Details Anomalous Stability of nu=1 Bilayer Quantum Hall State Anomalous Stability of nu=1 Bilayer Quantum Hall State

1997-05-13

arxiv.org/abs/cond-mat/9705115v1

Solid State Comm. 103 (1997) 447

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 6 figures

Scientific paper

10.1016/S0038-1098(97)00221-4

We have studied the fractional and integer quantum Hall (QH) effects in a high-mobility double-layer two-dimensional electron system. We have compared the "stability" of the QH state in balanced and unbalanced double quantum wells. The behavior of the n=1 QH state is found to be strikingly different from all others. It is anomalously stable, though all other states decay, as the electron density is made unbalanced between the two quantum wells. We interpret the peculiar features of the nu=1 state as the consequences of the interlayer quantum coherence developed spontaneously on the basis of the composite-boson picture.

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