Abstract
The new magnetotransport measurements performed in an ultrahigh mobility GaAs/AlGaAs specimen were discussed. It was found that the magnetotransport measurements were performed on a 300 Å wide modulation-doped GaAs/AlGaAs quantum well of density n ≃ 3.0 × 1011cm-2 and the ultrahigh mobility μ≃ 27 × 106 cm2/V s. The evidences were interpreted for a fractional quantum Hall liquid forming in the N = 2 Landau level. The results show that a magnetically driven insulator-insulator quantum phase transition occurred between the bubble and Wigner crystal phases at T = 0.
Original language | English (US) |
---|---|
Article number | 266804 |
Journal | Physical review letters |
Volume | 93 |
Issue number | 26 I |
DOIs | |
State | Published - Dec 31 2004 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy