Evidence of superfluidity in double layer 2D electron systems

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

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


When two parallel two-dimensional electron gases are sufficiently close together, interlayer Coulomb interactions are of comparable importance to intralayer ones. If the total number of electrons in the bilayer system equals the number of states in the lowest spin-resolved Landau level produced by a large perpendicular magnetic field, an exotic many-body state develops. This state exhibits a variety of remarkable properties including Josephson-like interlayer tunneling and precise quantization of the frictional drag between the layers. These findings lend strong support to the notion that this quantum coherent state is an example of a new kind of superfluid, one in which the underlying bosons are excitons comprised of electrons in one layer bound to holes in the other.

Original languageEnglish (US)
Pages (from-to)103-106
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Issue number1-3
StatePublished - May 2003
Externally publishedYes
Event23rd International Conference on Low Temperature Physics - Hiroshima, Japan
Duration: Aug 20 2002Aug 27 2002

All Science Journal Classification (ASJC) codes

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


  • Coulomb drag
  • Excitonic superfluidity
  • Josephson effect
  • Two-dimensional electron systems


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