Phys. Rev. B 45, 3890–3893 (1992)Observation of excess conductance of a constricted electron gas in the fractional quantum Hall regime
We present experimental results on the conductance of a two-dimensional electron system of filling factor ν2D in the fractional quantum Hall regime, containing a constricted region of lower filling factor νc. Conductance fluctuations are observed as a function of the voltage on the gate defining the constriction. The temperature dependence of the fluctuations exhibits three distinct regimes, governed by νc. For temperatures below 100 mK, and for ν2D=1/3, one anomalous peak increases to a value above the quantized conductance ν2D(e2/h) of the bulk. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.45.3890
DOI:
10.1103/PhysRevB.45.3890
PACS:
71.45.Gm, 71.55.Eq, 72.20.Ht, 73.40.Kp
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