Aharonov-bohm effect in a singly connected point contact
- 15 November 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 38 (14), 10162-10165
- https://doi.org/10.1103/physrevb.38.10162
Abstract
We report the discovery of an oscillation in the low-temperature magnetoresistance of a point contact in the two-dimensional electron gas of a heterostructure. The oscillation is periodic in the magnetic field and is reminiscent of the Aharonov-Bohm effect in rings, although the geometry is singly connected. A possible mechanism for this quantum interference effect is tunneling between edge states across the point contact at the potential step at the entrance and the exit of the constriction.
Keywords
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