Quantized Hall Effect in the Presence of Backscattering
- 12 December 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (24), 2801-2804
- https://doi.org/10.1103/physrevlett.61.2801
Abstract
The quantized Hall effect comprises edge states flowing in opposite directions on opposite edges of a two-dimensional electron gas. In a narrow wire, the presence of a potential barrier in the wire can cause the state to be reflected back into the oppositely directed state at the outer edge of the sample. Experiments on narrow (∼1 μm) wires with short cross gates confirm that backscattering is caused by the barrier drawn up by the gate. The barrier, by reflecting some fraction of the states, causes quantized plateaus in any four-probe measurement of resistance.
Keywords
This publication has 14 references indexed in Scilit:
- Quantized Multichannel Magnetotransport through a Barrier in Two DimensionsPhysical Review Letters, 1988
- Absence of backscattering in the quantum Hall effect in multiprobe conductorsPhysical Review B, 1988
- Prediction of Aharonov-Bohm Oscillations on the Quantum Hall Plateaus of Small and Narrow RingsPhysical Review Letters, 1988
- Four-terminal magnetoresistance of a two-dimensional electron-gas constriction in the ballistic regimePhysical Review B, 1988
- Quantum Hall effect in quasi one-dimensional systems: Resistance fluctuations and breakdownPhysical Review Letters, 1988
- Landauer-type formulation of quantum-Hall transport: Critical currents and narrow channelsPhysical Review B, 1988
- Edge states, transmission matrices, and the Hall resistancePhysical Review Letters, 1987
- Quantum transport in an electron-wave guidePhysical Review Letters, 1987
- Integral quantum Hall effect for nonspecialistsReviews of Modern Physics, 1987
- Electrical resistance of disordered one-dimensional latticesPhilosophical Magazine, 1970