Signatures of folded branches in the scanning gate microscopy of ballistic electronic cavities

Abstract

We demonstrate the emergence of classical features in electronic quantum transport for the scanning gate microscopy response in a cavity defined by a quantum point contact and a micron-sized circular reflector. The branches in electronic flow characteristic of a quantum point contact opening on a two-dimensional electron gas with weak disorder are folded by the reflector, yielding a complex spatial pattern. Considering the deflection of classical trajectories by the scanning gate tip allows to establish simple relationships of the scanning pattern, which are in agreement with recent experimental findings.

20 pages, 13 figures, revised version, submission to SciPost

References in corpus (4)

• On the imaging of electron transport in semiconductor quantum structures by scanning-gate microscopy: successes and limitations
• What is measured in the scanning gate microscopy of a quantum point contact?
• Partial local density of states from scanning gate microscopy
• Accurate characterization of tip-induced potential using electron interferometry

Cited by in corpus (3)

• Deep neural networks for inverse problems in mesoscopic physics: Characterization of the disorder configuration from quantum transport properties
• Gate-tunable regular and chaotic electron dynamics in ballistic bilayer graphene cavities
• Imaging signatures of the local density of states in an electronic cavity