Quantum hall exciton condensation at full spin polarization

A. D.K. Finck, J. P. Eisenstein, L. N. Pfeiffer, K. W. West

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34 Scopus citations


Using Coulomb drag as a probe, we explore the excitonic phase transition in quantum Hall bilayers at νT=1 as a function of Zeeman energy EZ. The critical layer separation (d/ℓ)c for exciton condensation initially increases rapidly with EZ, but then reaches a maximum and begins a gentle decline. At high EZ, where both the excitonic phase at small d/ℓ and the compressible phase at large d/ℓ are fully spin polarized, we find that the width of the transition, as a function of d/ℓ, is much larger than at small EZ and persists in the limit of zero temperature. We discuss these results in the context of two models in which the system contains a mixture of the two fluids.

Original languageEnglish (US)
Article number016801
JournalPhysical review letters
Issue number1
StatePublished - Jan 4 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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