Matthews, A., Kavokin, K., Usher, A., Portnoi, M., Zhu, M., Gething, J., Elliott, Martin ![]() |
Abstract
We have developed a model of the high-current breakdown of the integer quantum Hall effect, as measured in contactless experiments using a highly-sensitive torsion balance magnetometer. The model predicts that, for empirically “low-mobility” samples (μ<75m2V−1s−1), the critical current for breakdown should decrease with, and have a linear dependence on, temperature. This prediction is verified experimentally with the addition of a low-temperature saturation of the critical current at a temperature that depends on both sample number density and filling factor. It is shown that this saturation is consistent with quasielastic inter-Landau-level scattering when the maximum electric field in the sample reaches a large enough value. In addition we show how this model can be extended to give qualitative agreement with experiments on high-mobility samples.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Physics and Astronomy |
Subjects: | Q Science > QC Physics |
Publisher: | American Physical Society |
ISSN: | 1098-0121 |
Last Modified: | 25 Oct 2022 09:39 |
URI: | https://orca.cardiff.ac.uk/id/eprint/59500 |
Citation Data
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