Abstract
We present experimental results on the conductance of a two-dimensional electron system of filling factor in the fractional quantum Hall regime, containing a constricted region of lower filling factor . 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 . For temperatures below 100 mK, and for =1/3, one anomalous peak increases to a value above the quantized conductance (/h) of the bulk.
- Received 21 November 1991
DOI:https://doi.org/10.1103/PhysRevB.45.3890
©1992 American Physical Society