Self-organised criticality in the quantum Hall effect

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

Full text not available from this repository.

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:	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

Citation Data

Cited 2 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item