Selective Population and Detection of Edge Channels in the Fractional Quantum Hall Regime

L.P. Kouwenhoven, B.J. van Wees, N.C. van der Vaart, C.J.P.M. Harmans, C.E. Timmering, C.T. Foxon

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Abstract

Transport in the fractional-quantum-Hall-effect (FQHE) regime is studied in a two-dimensional electron gas (2DEG) employing adjustable barriers as current and voltage probes. We find a fractionally quantized Hall conductance for integer filling factor in the bulk of the 2DEG, as a consequence of the fractional filling factor in the probes. We argue that this effect is the first manifestation of adiabatic transport in the FQHE. The results are in agreement with a proposed Landauer-Büttiker formula in which each fractional edge channel contributes a conductance ⅓e2/h.
Original languageEnglish
Number of pages4
JournalPhysical Review Letters
Volume64
Issue number6
DOIs
Publication statusPublished - 1990

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