Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States

M. A. Mueed, D. Kamburov, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan

Research output: Contribution to journalArticle

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Abstract

Via the application of a parallel magnetic field, we induce a single-layer to bilayer transition in two-dimensional electron systems confined to wide GaAs quantum wells and study the geometric resonance of composite fermions (CFS) with a periodic density modulation in our samples. The measurements reveal that CFS exist close to bilayer quantum Hall states, formed at Landau level filling factors ν=1 and 1/2. Near ν=1, the geometric resonance features are consistent with half the total electron density in the bilayer system, implying that CFS prefer to stay in separate layers and exhibit a two-component behavior. In contrast, close to ν=1/2, CFS appear single-layer-like (single component) as their resonance features correspond to the total density.

Original languageEnglish (US)
Article number246801
JournalPhysical review letters
Volume117
Issue number24
DOIs
StatePublished - Dec 6 2016

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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