National Physical Laboratory

Detecting the Energy Spectrum of Single-Electron Emission

Further Information

Published: 23 July 2013

Authors: M Kataoka, J D Fletcher, J Waldie, H Howe, M Pepper, P See, S P Giblin, J P Griffiths, G A C Jones, I Farrer, D A Ritchie and T J B M Janssen

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Here, we investigate the emission characteristics of a tunable-barrier single-electron pump, using the energy-detection-barrier technique.

A tunnel barrier is placed a few microns away from a single-electron pump. In a perpendicular magnetic field B, the emitted electrons travel through edge states, well above the Fermi energy, before they reach the detector barrier.

Depending on the barrier height relative to the electron energy, the electrons are transmitted through the barrier and appear as the collector current, or are reflected by the barrier and appear as the side-contact current. The inelastic scattering length is estimated from the phonon replica observed in the emission spectrum.

Last Updated: 21 Oct 2016
Created: 29 Apr 2013

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