Temperature dependence of the breakdown of the quantum Hall effect studied by induced currents
Matthews, A.J.; Kavokin, K.V.; Usher, Alan; et al.Portnoi, M.E.; Zhu, M.; Gething, J.D.; Elliott, Martin; Herrenden-Harker, W.G.; Phillips, K.; Ritchie, D.A.; Simmons, M.Y.; Sorensen, C.B.; Hansen, O.P.; Mironov, O.A.; Myronov, M.; Leadley, D.R.; Henini, M.
Date: 2004
Journal
Physical Review B
Publisher
American Physical Society
Publisher DOI
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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<75 m2 V−1 s−1), the critical current for breakdown should decrease with, and have a ...
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<75 m2 V−1 s−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.
Physics and Astronomy
Faculty of Environment, Science and Economy
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