Scanning gate experiments: from strongly to weakly invasive probes

Abstract

An open resonator fabricated in a two-dimensional electron gas is used to explore the transition from strongly invasive scanning gate microscopy to the perturbative regime of weak tip-induced potentials. With the help of numerical simulations that faithfully reproduce the main experimental findings, we quantify the extent of the perturbative regime in which the tip-induced conductance change is unambiguously determined by properties of the unperturbed system. The correspondence between the experimental and numerical results is established by analyzing the characteristic length scale and the amplitude modulation of the conductance change. In the perturbative regime, the former is shown to assume a disorder-dependent maximum value, while the latter linearly increases with the strength of a weak tip potential.

arXiv comment11 pages, 7 figures

References in corpus (20)

• Kwant: a software package for quantum transport
• Coherent Branched Flow in a Two-Dimensional Electron Gas
• Partial Densities of States, Scattering Matrices, and Green's Functions
• Local Density of States in Mesoscopic Samples from Scanning Gate Microscopy
• Imaging Electron Interferometer
• What is measured in the scanning gate microscopy of a quantum point contact?
• Theory of scanning gate microscopy
• Measurement of the Tip-Induced Potential in Scanning Gate Experiments
• A scanning gate microscope for cold atomic gases
• Transport Spectroscopy of a Spin-Coherent Dot-Cavity System
• Interference of electrons in backscattering through a quantum point contact
• Gating of high-mobility two-dimensional electron gases in GaAs/AlGaAs heterostructures
• Simulations of imaging of the local density of states by charged probe technique for resonant cavities
• Partial local density of states from scanning gate microscopy
• Diffractive orbits in an open microwave billiard
• Scanning gate imaging in confined geometries
• Scanning-gate-induced effects and spatial mapping of a cavity
• Classical origin of conductance oscillations in an integrable cavity
• Locally induced quantum interference in scanning gate experiments
• In Situ Treatment of a Scanning Gate Microscopy Tip

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• 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
• Signatures of folded branches in the scanning gate microscopy of ballistic electronic cavities
• Reconstructing the potential configuration in a high-mobility semiconductor heterostructure with scanning gate microscopy
• Magnetoresistance in an electronic cavity coupled to one-dimensional systems
• Imaging signatures of the local density of states in an electronic cavity
• Local signatures of electron-electron scattering in an electronic cavity
• Extrinsic thermoelectric response of coherent conductors