Stable branched electron flow

The pattern of branched electron flow revealed by scanning gate microscopy shows the distribution of ballistic electron trajectories. The details of the pattern are determined by the correlated potential of remote dopants with an amplitude far below the Fermi energy. We find that the pattern persist...

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Bibliographic Details
Published in:New journal of physics 2018-07, Vol.20 (7), p.73015
Main Authors: Braem, B A, Gold, C, Hennel, S, Röösli, M, Berl, M, Dietsche, W, Wegscheider, W, Ensslin, K, Ihn, T
Format: Article
Language:English
Subjects:
Amplitudes
branched electron flow
Carrier density
Charge density
Current carriers
Electron density
Electron trajectories
local perturbation
mesoscopic
Physics
quantum transport
scanning gate microscopy
trajectory simulation
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Summary:The pattern of branched electron flow revealed by scanning gate microscopy shows the distribution of ballistic electron trajectories. The details of the pattern are determined by the correlated potential of remote dopants with an amplitude far below the Fermi energy. We find that the pattern persists even if the electron density is significantly reduced such that the change in Fermi energy exceeds the background potential amplitude. The branch pattern is robust against changes in charge carrier density, but not against changes in the background potential caused by additional illumination of the sample.
ISSN:1367-2630
1367-2630
DOI:10.1088/1367-2630/aad068