Details
| Original language | English |
|---|---|
| Pages (from-to) | 95-100 |
| Number of pages | 6 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 1 |
| Issue number | 1-4 |
| Publication status | Published - 19 Jan 1997 |
Abstract
We have studied time-resolved transport in a two-dimensional electron gas in the integer and fractional quantum Hall regime. In samples with a smooth edge and an additional screening electrode, the propagation velocity of high-frequency signals depends on the number and width of the involved edge channels, and thus can be used to obtain an approximate electron density profile. The amplitude of the transmitted signals oscillates with respect to the applied magnetic field with maxima appearing close to integer and fractional bulk filling factors. While the data around filling factor 1/3 are qualitatively similar to those around filling factors 1 and 2, deviations appear around filling factor 2/3. At odd filling factors, signal propagation in partially decoupled edge channels is observed.
Keywords
- Time-resolved transport measurement, Two-dimensional electron gases
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 1, No. 1-4, 19.01.1997, p. 95-100.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Probing the edge of a 2DEG by time-resolved transport measurements
AU - Ernst, G.
AU - Zhitenev, N. B.
AU - Haug, R. J.
AU - Von Klitzing, K.
N1 - Funding information: We would like to thank B. Farid, R. Gerhardts, S. Mikhailov and D. Pfannkuche for useful discussions, A. Yacoby for critical reading of the manuscript, and K. Eberl for providing the heterostructures. N.B.Z. was supported by Alexander von Humboldt Foundation.
PY - 1997/1/19
Y1 - 1997/1/19
N2 - We have studied time-resolved transport in a two-dimensional electron gas in the integer and fractional quantum Hall regime. In samples with a smooth edge and an additional screening electrode, the propagation velocity of high-frequency signals depends on the number and width of the involved edge channels, and thus can be used to obtain an approximate electron density profile. The amplitude of the transmitted signals oscillates with respect to the applied magnetic field with maxima appearing close to integer and fractional bulk filling factors. While the data around filling factor 1/3 are qualitatively similar to those around filling factors 1 and 2, deviations appear around filling factor 2/3. At odd filling factors, signal propagation in partially decoupled edge channels is observed.
AB - We have studied time-resolved transport in a two-dimensional electron gas in the integer and fractional quantum Hall regime. In samples with a smooth edge and an additional screening electrode, the propagation velocity of high-frequency signals depends on the number and width of the involved edge channels, and thus can be used to obtain an approximate electron density profile. The amplitude of the transmitted signals oscillates with respect to the applied magnetic field with maxima appearing close to integer and fractional bulk filling factors. While the data around filling factor 1/3 are qualitatively similar to those around filling factors 1 and 2, deviations appear around filling factor 2/3. At odd filling factors, signal propagation in partially decoupled edge channels is observed.
KW - Time-resolved transport measurement
KW - Two-dimensional electron gases
UR - http://www.scopus.com/inward/record.url?scp=0031355606&partnerID=8YFLogxK
U2 - 10.1016/S1386-9477(97)00021-0
DO - 10.1016/S1386-9477(97)00021-0
M3 - Article
AN - SCOPUS:0031355606
VL - 1
SP - 95
EP - 100
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 1-4
ER -