Magnetotransport study in the layer imbalanced ν = 1 bilayer quantum Hall state

Y. Ogasawara, A. Fukuda, K. Iwata, T. Sekikawa, T. Arai, Y. Hirayama, F. Ezawa, A. Sawada

Research output: Contribution to journalArticle

Abstract

We carried out magnetotransport measurements of the charge imbalanced bilayer quantum Hall state (QHS) at the total Landau level filling factor ν = 1 under the titled magnetic fields. Changing the total electron densities nT and the layer imbalance parameter = σ (nf - n b)/(nf + nb), where nf(n b) indicates the density of the front (back) layer, we investigated magnetoresistance near the phase transition point between the charge transferable bilayer QHS and the 1/3+2/3 compound QHS at large in-plane magnetic fields B. We measured the thermal activation energy Δ for various nT and θ, and constructed detailed phase diagram in the nT-θ plane at σ = 0.33, including commensurate(C)-like, incommensurate (IC)-like and the compound state. Results indicate that each transition between the compound QHS and the C-like or IC-like phases reflects the pseudospin symmetries.

Original languageEnglish
Article number022068
JournalJournal of Physics: Conference Series
Volume150
Issue number2
DOIs
Publication statusPublished - 2009

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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