LO-Phonon Emission Rate of Hot Electrons from an On-Demand Single-Electron Source in a GaAs/AlGaAs Heterostructure

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Using a recent time-of-flight measurement technique with 1 ps time resolution and electron-energy spectroscopy, we develop a method to measure the longitudinal-optical-phonon emission rate of hot electrons traveling along a depleted edge of a quantum Hall bar. Comparison to a single-particle model implies the scattering mechanism involves a two-step process via an intra-Landau-level transition. We show that this can be suppressed by control of the edge potential profile, and a scattering length > 1 mm can be achieved, allowing the use of this system for scalable single-electron device applications.
Publisher
AMER PHYSICAL SOC
Issue Date
2018-09
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.121, no.13, pp.137703

ISSN
0031-9007
DOI
10.1103/PhysRevLett.121.137703
URI
http://hdl.handle.net/10203/254192
Appears in Collection
PH-Journal Papers(저널논문)
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