Details
| Original language | English |
|---|---|
| Pages (from-to) | 3875-3879 |
| Number of pages | 5 |
| Journal | Physical Review B |
| Volume | 44 |
| Issue number | 8 |
| Publication status | Published - 1 Jan 1991 |
| Externally published | Yes |
Abstract
We report low-temperature experiments on noise (in equilibrium and in the presence of current flow) in Hall bars with 0.5-m gates across them. The Hall bars were formed on high-mobility GaAs-AlxGa1-xAs heterostructures, and by using the gate we were able to explore the noise characteristics both in the integer quantized Hall effect and for fractional filling factors. In the integer quantized Hall effect, the noise power exhibits plateaus where the resistance does, and it exhibits plateaus in spite of the lack of clear resistance plateaus when the filling factor is fractional beneath the gate. The excess noise found in the experiments is less than that predicted by the simple shot-noise formula.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B, Vol. 44, No. 8, 01.01.1991, p. 3875-3879.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Noise from backscattered electrons in the integer and fractional quantized Hall effects
AU - Washburn, S.
AU - Haug, R. J.
AU - Lee, K. Y.
AU - Hong, J. M.
PY - 1991/1/1
Y1 - 1991/1/1
N2 - We report low-temperature experiments on noise (in equilibrium and in the presence of current flow) in Hall bars with 0.5-m gates across them. The Hall bars were formed on high-mobility GaAs-AlxGa1-xAs heterostructures, and by using the gate we were able to explore the noise characteristics both in the integer quantized Hall effect and for fractional filling factors. In the integer quantized Hall effect, the noise power exhibits plateaus where the resistance does, and it exhibits plateaus in spite of the lack of clear resistance plateaus when the filling factor is fractional beneath the gate. The excess noise found in the experiments is less than that predicted by the simple shot-noise formula.
AB - We report low-temperature experiments on noise (in equilibrium and in the presence of current flow) in Hall bars with 0.5-m gates across them. The Hall bars were formed on high-mobility GaAs-AlxGa1-xAs heterostructures, and by using the gate we were able to explore the noise characteristics both in the integer quantized Hall effect and for fractional filling factors. In the integer quantized Hall effect, the noise power exhibits plateaus where the resistance does, and it exhibits plateaus in spite of the lack of clear resistance plateaus when the filling factor is fractional beneath the gate. The excess noise found in the experiments is less than that predicted by the simple shot-noise formula.
UR - http://www.scopus.com/inward/record.url?scp=0040056417&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.44.3875
DO - 10.1103/PhysRevB.44.3875
M3 - Article
AN - SCOPUS:0040056417
VL - 44
SP - 3875
EP - 3879
JO - Physical Review B
JF - Physical Review B
SN - 0163-1829
IS - 8
ER -