Bilayer 2D electron systems at νtot = 1: Phase boundary between weak and strong coupling

J. P. Eisenstein, M. Kellogg, I. B. Spielman, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


The collapse of the excitonic quantized Hall state at νtot = 1 in double layer two-dimensional electron systems is studied via interlayer tunneling and Coulomb drag. We find that spontaneous interlayer phase coherence, perhaps the most important hallmark of the excitonic phase and directly detected via a strong resonant enhancement of the zero-bias tunneling conductance, collapses very rapidly above a critical layer separation. In contrast, a related anomaly in the longitudinal component of Coulomb drag at νtot = 1 subsides much more slowly as the layer separation is increased beyond the critical point.

Original languageEnglish (US)
Pages (from-to)111-116
Number of pages6
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-2
StatePublished - Dec 2003
Externally publishedYes
EventProceedings of the International Symposium at Quantum Hall Effect - Stuttgart, Germany
Duration: Jul 2 2003Jul 5 2003

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


  • Bilayer 2D system
  • Excitonic superfluid
  • Quantized Hall effect


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