Phase Transition in ν=2 Bilayer Quantum Hall State

Details Phase Transition in ν=2 Bilayer Quantum Hall State Phase Transition in ν=2 Bilayer Quantum Hall State

1998-01-10

arxiv.org/abs/cond-mat/9801085v1

Physical Review Letters 80 (1998) 4534

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages including figures, RevTeX

Scientific paper

10.1103/PhysRevLett.80.4534

The Hall-plateau width and the activation energy were measured in the bilayer quantum Hall state at filling factor \nu=2, 1 and 2/3, by changing the total electron density and the density ratio in the two quantum wells. Their behavior are remarkably different from one to another. The \nu=1 state is found stable over all measured range of the density difference, while the \nu=2/3$ state is stable only around the balanced point. The \nu=2 state, on the other hand, shows a phase transition between these two types of the states as the electron density is changed.

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