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Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields

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Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields. / Hayne, M ; Usher, Alan; Harris, Jeffery J et al.
In: Physica E: Low-dimensional Systems and Nanostructures, Vol. 1, No. 1-4, 12.1997, p. 125-128.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Hayne, M, Usher, A, Harris, JJ & Foxon, CT 1997, 'Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields', Physica E: Low-dimensional Systems and Nanostructures, vol. 1, no. 1-4, pp. 125-128. https://doi.org/10.1016/S1386-9477(97)00028-3

APA

Hayne, M., Usher, A., Harris, J. J., & Foxon, C. T. (1997). Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields. Physica E: Low-dimensional Systems and Nanostructures, 1(1-4), 125-128. https://doi.org/10.1016/S1386-9477(97)00028-3

Vancouver

Hayne M, Usher A, Harris JJ, Foxon CT. Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields. Physica E: Low-dimensional Systems and Nanostructures. 1997 Dec;1(1-4):125-128. doi: 10.1016/S1386-9477(97)00028-3

Author

Hayne, M ; Usher, Alan ; Harris, Jeffery J et al. / Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields. In: Physica E: Low-dimensional Systems and Nanostructures. 1997 ; Vol. 1, No. 1-4. pp. 125-128.

Bibtex

@article{34ed271b67ba47b4b3998303bd885b4d,
title = "Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields",
abstract = "We have observed the quantum Hall effect in a high mobility two-dimensional electron gas to filling factors up to 80 at 0.3 K. This demonstrates the presence of both localized and extended states at low field, and explains the failure of the standard semi-classical analysis of Shubnikov-de Haas (SdH) oscillations in this regime. We go on to derive a general expression for the conductivity due to rectangular bands of extended states, and show that the observed temperature dependence of the SdH oscillations is consistent with this picture. An analysis of the oscillations using this expression reveals the predicted levitation of the extended states as the magnetic field is reduced. (C) 1997 Elsevier Science B.V. All rights reserved.",
keywords = "Shubnikov-de Haas, quantum Hall effect, levitation, CONDUCTIVITY",
author = "M Hayne and Alan Usher and Harris, {Jeffery J} and Foxon, {C Tom}",
year = "1997",
month = dec,
doi = "10.1016/S1386-9477(97)00028-3",
language = "English",
volume = "1",
pages = "125--128",
journal = "Physica E: Low-dimensional Systems and Nanostructures",
issn = "1386-9477",
publisher = "Elsevier",
number = "1-4",

}

RIS

TY - JOUR

T1 - Transport studies of localized and extended states of a two-dimensional electron gas in low magnetic fields

AU - Hayne, M

AU - Usher, Alan

AU - Harris, Jeffery J

AU - Foxon, C Tom

PY - 1997/12

Y1 - 1997/12

N2 - We have observed the quantum Hall effect in a high mobility two-dimensional electron gas to filling factors up to 80 at 0.3 K. This demonstrates the presence of both localized and extended states at low field, and explains the failure of the standard semi-classical analysis of Shubnikov-de Haas (SdH) oscillations in this regime. We go on to derive a general expression for the conductivity due to rectangular bands of extended states, and show that the observed temperature dependence of the SdH oscillations is consistent with this picture. An analysis of the oscillations using this expression reveals the predicted levitation of the extended states as the magnetic field is reduced. (C) 1997 Elsevier Science B.V. All rights reserved.

AB - We have observed the quantum Hall effect in a high mobility two-dimensional electron gas to filling factors up to 80 at 0.3 K. This demonstrates the presence of both localized and extended states at low field, and explains the failure of the standard semi-classical analysis of Shubnikov-de Haas (SdH) oscillations in this regime. We go on to derive a general expression for the conductivity due to rectangular bands of extended states, and show that the observed temperature dependence of the SdH oscillations is consistent with this picture. An analysis of the oscillations using this expression reveals the predicted levitation of the extended states as the magnetic field is reduced. (C) 1997 Elsevier Science B.V. All rights reserved.

KW - Shubnikov-de Haas

KW - quantum Hall effect

KW - levitation

KW - CONDUCTIVITY

U2 - 10.1016/S1386-9477(97)00028-3

DO - 10.1016/S1386-9477(97)00028-3

M3 - Journal article

VL - 1

SP - 125

EP - 128

JO - Physica E: Low-dimensional Systems and Nanostructures

JF - Physica E: Low-dimensional Systems and Nanostructures

SN - 1386-9477

IS - 1-4

ER -