Correlated states of an electron system in a wide quantum well

Y. W. Suen, M. B. Santos, M. Shayegan

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Magnetotransport experiments on a low-disorder electron system in an 800 -wide GaAs quantum well reveal a dramatic evolution from a double- to a single-layer system as the electron density is decreased or the system is made asymmetric. At an intermediate density of 9.7×1010 cm-2, we observe fractional quantum Hall states at Landau level filling factors of ν=3/4, 1/2, and 1/3, with an insulating phase separating the ν=1/2 and 1/3 liquid states. Our data demonstrate that the ν=1/2 state and the insulating phase are most stable in symmetric double-layer systems with appropriate parameters while the ν=1/3 and 3/5 states have a single-layer origin.

Original languageEnglish (US)
Pages (from-to)3551-3554
Number of pages4
JournalPhysical review letters
Issue number24
StatePublished - 1992

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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