Trapping and counting ballistic non-equilibrium electrons
arXiv:1902.11253 · doi:10.1103/PhysRevLett.124.127701
Abstract
We demonstrate the trapping of electrons propagating ballistically at far-above-equilibrium energies in GaAs/AlGaAs heterostructures in high magnetic field. We find low-loss transport along a gate-modified mesa edge in contrast to an effective decay of excess energy for the loop around a neighboring, mesa-confined node, enabling high-fidelity trapping. Measuring the full counting statistics via single-charge detection yields the trapping (and escape) probabilities of electrons scattered (and excited) within the node. Energetic and arrival-time distributions of captured electron wave packets are characterized by modulating tunnel barrier transmission.
arXiv comment6 pages, 4 figures. Majorly revised, accepted manuscript
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