Origin of the ν=1/2 fractional quantum Hall state in wide single quantum wells

Y. W. Suen, H. C. Manoharan, X. Ying, M. B. Santos, Mansour Shayegan

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

We study the effect of subband energy separation and asymmetry on the quasiparticle excitation gaps of the ν=1/2 and coexisting fractional quantum Hall (FQH) states in wide single quantum wells. A new even-denominator FQH state at ν=3/2 and a dramatic subband-mixing-driven phase transition from a one- to two-component FQH state at ν=2/3 are observed. Our results reveal the two-component origin of the ν=1/2 FQH state, and allow us to construct an experimental phase diagram for electron states at half filling.

Original languageEnglish (US)
Pages (from-to)3405-3408
Number of pages4
JournalPhysical Review Letters
Volume72
Issue number21
DOIs
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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