Detecting the Energy Spectrum of Single-Electron Emission
Download (PDF 1.27 MB)
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.
Please note that the information will not be divulged to third parties, or used without your permission