Forward scattering probe of edge-state coupling in the quantum Hall regime

Yeong Ah Soh, Yeong Ah Soh, Frank M. Zimmermann, Harold G. Craighead

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We report on magnetoconductance measurements of a submicrometer-wide constriction in a two-dimensional electron gas with a tunable central gate. For negative central gate biases, an edge channel loop forms around the central-gate potential hump and couples to reflected edge channels, opening a forward scattering pathway. From the conductance contribution of this pathway we deduce that the transmission probability for tunneling between adjacent edge channels of different Landau levels is 0.5, corresponding to the strong-coupling limit, for a coupling region of only a few hundred nanometers in length.

Original languageEnglish (US)
Article number153303
Pages (from-to)1533031-1533034
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
StatePublished - Oct 15 2001

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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