Breakdown of the Dissipationless Quantum Hall State: Quantised Steps and Analogies with Classical and Quantum Fluid Dynamics

• Authors: L. Eaves
• Languages of publication: EN

Abstracts

EN

The breakdown of the integer quantum Hall effect at high currents sometimes occurs as a series of regular steps in the dissipative voltage drop measured along the Hall bar. The steps were first seen clearly in two Hall bars used to maintain the US Resistance Standard, but have also been reported in other devices. It is proposed that the origin of the steps can be understood in terms of an instability in the dissipationless flow at high electron drift velocities. The instability is induced by impurity- or defect-related inter-Landau level scattering processes in local microscopic regions of the Hall bar. Electron-hole pairs (magneto-excitons) are generated in the quantum Hall fluid in these regions and that the electronic motion can be envisaged as a quantum analogue of the von Karman vortex street which forms when a classical fluid flows past an obstacle.

Keywords

EN

73.43.Jn   73.43.Cd   73.61.Ey  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: 2
• Pages: 205-212

Dates

published

2001-08

received

2001-06-01

References

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Identifiers

DOI

10.12693/APhysPolA.100.205