Interlayer quantum coherence and anomalous stability of ν = 1 bilayer quantum Hall state

A. Sawada, Z. F. Ezawa, H. Ohno, Y. Horikoshi, S. Kishimoto, F. Matsukura, Y. Ohno, M. Yasumoto, A. Urayama

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We have compared the stability of the ν = 2, 1 and 2/3 quantum Hall states in a bilayer two-dimensional electron system by changing the total density and the density ratio of electrons in the two quantum wells. The following experimental results have been obtained: The ν = 1 state is stable over a wide range of the density difference. It is least stable when the electron density is balanced. The state collapses when the total density is more than a critical value. The density ratio has a small influence on the stability of ν = 1. These features are not shared by the other quantum Hall states. We argue that they give an indication of the interlayer quantum coherence.

Original languageEnglish
Pages (from-to)836-840
Number of pages5
JournalPhysica B: Condensed Matter
Publication statusPublished - 1998 Jun 17


  • Double quantum wells
  • Fractional quantum Hall effect
  • Quantum Hall effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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