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

Johnson, N; Emary, C; Ryu, S; Sim, H-S; See, P; Fletcher, J D; Griffiths, J P; Jones, G A C; Farrer, I; Ritchie, D A; Pepper, M; Janssen, T J B M; Kataoka, M

Johnson, N; Emary, C; Ryu, S; Sim, H-S; See, P; Fletcher, J D; Griffiths, J P; Jones, G A C; Farrer, I; Ritchie, D A; Pepper, M; Janssen, T J B M; Kataoka, M.

Afiliación

Johnson N; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom.
Emary C; London Centre for Nanotechnology, and Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom.
Ryu S; Joint Quantum Centre Durham-Newcastle, School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom.
Sim HS; Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.
See P; Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea.
Fletcher JD; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom.
Griffiths JP; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom.
Jones GAC; Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Farrer I; Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Ritchie DA; Department of Electronic and Electrical Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom.
Pepper M; Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Janssen TJBM; London Centre for Nanotechnology, and Department of Electronic and Electrical Engineering, University College London, Torrington Place, London, WC1E 7JE, United Kingdom.
Kataoka M; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, United Kingdom.

Phys Rev Lett ; 121(13): 137703, 2018 Sep 28.

Article en En | MEDLINE | ID: mdl-30312059

ABSTRACT

ABSTRACT

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.

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Texto completo: 1 Bases de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2018 Tipo del documento: Article País de afiliación: Reino Unido