Phillips, K. L., Elliott, Martin  ORCID: https://orcid.org/0000-0002-9254-9898, Lu, Y., Herrenden-Harker, William, Matthews, A. J., Gething, J. D., Usher, A., Henini, M., Ritchie, D. A. and Simmons, M. Y.
2004.
Self-organised criticality in the quantum Hall effect.
Physica E: Low-dimensional Systems and Nanostructures
22
(1-3)
, pp. 210-213.
10.1016/j.physe.2003.11.251
|
Abstract
We have measured breakdown of the quantum Hall effect in various two-dimensional electron gases formed in MBE-grown GaAs-(Al,Ga)As modulation-doped heterostructures around filling factor ν=2, using a contact-free method. In this method, circulating eddy currents are induced in the sample upon sweeping the magnetic field, and are detected via their magnetic moment using a sensitive magnetometer. At sufficiently high sweep rates, and temperatures below about View the MathML source, the induced eddy current peak size saturates, and often a ‘noisy’ breakdown of the current is observed superimposed on the main eddy current peak. We describe a simple interpretation of this breakdown in terms of a self-organised criticality model of breakdown of the quantum Hall effect, due to the strong Hall field perpendicular to the eddy current direction.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Uncontrolled Keywords: | Quantum Hall; Breakdown; Self-organised systems |
| Publisher: | Elsevier |
| ISSN: | 1386-9477 |
| Last Modified: | 25 Oct 2022 09:39 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/59503 |
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