On the imaging of electron transport in semiconductor quantum structures by scanning-gate microscopy: successes and limitations

Abstract

This paper presents a brief review of scanning-gate microscopy applied to the imaging of electron transport in buried semiconductor quantum structures. After an introduction to the technique and to some of its practical issues, we summarise a selection of its successful achievements found in the literature, including our own research. The latter focuses on the imaging of GaInAs-based quantum rings both in the low magnetic field Aharonov-Bohm regime and in the high-field quantum Hall regime. Based on our own experience, we then discuss in detail some of the limitations of scanning-gate microscopy. These include possible tip induced artefacts, effects of a large bias applied to the scanning tip, as well as consequences of unwanted charge traps on the conductance maps. We emphasize how special care must be paid in interpreting these scanning-gate images.

Special issue on (nano)characterization of semiconductor materials and structures

References in corpus (37)

• Observation of Electron-Hole Puddles in Graphene Using a Scanning Single Electron Transistor
• Coherent Branched Flow in a Two-Dimensional Electron Gas
• The microscopic nature of localization in the quantum Hall effect
• Distinct Signatures For Coulomb Blockade and Aharonov-Bohm Interference in Electronic Fabry-Perot Interferometers
• Subsurface charge accumulation imaging of a quantum Hall liquid
• Imaging Magnetic Focusing of Coherent Electron Waves
• The Quantum Hall Transition in Real Space: From Localized to Extended States
• Unexpected features of branched flow through high-mobility two-dimensional electron gases
• Influence of Interactions on Flux and Back-gate Period of Quantum Hall Interferometers
• Imaging Fractal Conductance Fluctuations and Scarred Wave Functions in a Quantum Billiard
• Topographic Mapping of the Quantum Hall Liquid using a Few-Electron Bubble
• Spatially resolved manipulation of single electrons in quantum dots using a scanned probe
• Green's function technique for studying electron flow in 2D mesoscopic samples
• Imaging Localized States in Graphene Nanostructures
• Near-field optical microscopy with a nanodiamond-based single photon tip
• Imaging a Single-Electron Quantum Dot
• `Deterministic' quantum plasmonics
• Imaging and controlling electron transport inside a quantum ring
• The nature of localization in graphene under quantum Hall conditions
• Imaging Electron Wave Functions Inside Open Quantum Rings
• Imaging Coulomb Islands in a Quantum Hall Interferometer
• Electron interferometer formed with a scanning probe tip and quantum point contact
• Scanning gate microscopy of current-annealed single layer graphene
• Imaging Transport Resonances in the Quantum Hall Effect
• 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?
• Imaging coherent transport in graphene (Part II): Probing weak localization
• Imaging Inter-Edge State Scattering Centers in the Quantum Hall Regime
• Measurement of the Tip-Induced Potential in Scanning Gate Experiments
• Spatially probed electron-electron scattering in a two-dimensional electron gas
• Single electron charging of impurity sites visualized by scanning gate experiments on a quantum point contact
• Imaging a Coupled Quantum Dot - Quantum Point Contact System
• Combined scanning force microscopy and scanning tunneling spectroscopy of an electronic nano-circuit at very low temperature
• Scanning Gate Microscopy of a Nanostructure where Electrons Interact
• Local density of states in disordered two-dimensional electron gases at high magnetic field
• In Situ Treatment of a Scanning Gate Microscopy Tip

Cited by in corpus (46)

• Scattering of two-dimensional massless Dirac electrons by a circular potential barrier
• Transport inefficiency in branched-out mesoscopic networks: An analog of the Braess paradox
• Theory of scanning gate microscopy
• A scanning gate microscope for cold atomic gases
• Unraveling quantum Hall breakdown in bilayer graphene with scanning gate microscopy
• Interference features in scanning gate conductance maps of quantum point contacts with disorder
• Simulations of imaging of the local density of states by charged probe technique for resonant cavities
• Aharonov-Bohm interferometer based on n-p junction in graphene nanoribbons
• Partial local density of states from scanning gate microscopy
• Gate control of superconducting current: Mechanisms, parameters and technological potential
• Imaging snake orbits at graphene n-p junctions
• Scanning-gate-induced effects and spatial mapping of a cavity
• Investigation of laser-induced-metal phase of ${\mathrm{MoTe}}_2$ and its contact property via scanning gate microscopy
• Energy Stability of Branching in the Scanning Gate Response of Two-Dimensional Electron Gases with Smooth Disorder
• Deep neural networks for inverse problems in mesoscopic physics: Characterization of the disorder configuration from quantum transport properties
• A new transport phenomenon in nanostructures: A mesoscopic analog of the Braess paradox encountered in road networks
• Microscopic Conductivity of Lattice Fermions at Equilibrium - Part I: Non-Interacting Particles
• Imaging backscattering in graphene quantum point contacts
• Thermoelectric Scanning Gate Interferometry on a Quantum Point Contact
• Classical origin of conductance oscillations in an integrable cavity
• Conductance response of graphene nanoribbons and quantum point contacts in the scanning probe measurements
• Scanning-gate-induced effects in nonlinear transport through nanostructures
• Scanned single-electron probe inside a silicon electronic device
• Spatial Current Patterns, Dephasing and Current Imaging in Graphene Nanoribbons
• Atomic Resolution Imaging of Currents in Nanoscopic Quantum Networks via Scanning Tunneling Microscopy
• Scanning gate microscopy mapping of edge current and branched electron flow in a transition metal dichalcogenide nanoribbon and quantum point contact
• Imaging of double slit interference by scanning gate microscopy
• Formation of quantum dots in the potential fluctuations of InGaAs heterostructures probed by scanning gate microscopy
• Signatures of folded branches in the scanning gate microscopy of ballistic electronic cavities
• Multisubband transport and magnetic deflection of Fermi electron trajectories in three terminal junctions and rings
• Mode specific backscattering in a quantum point contact
• Wave function description of conductance mapping for quantum Hall electron interferometer
• Reconstructing the potential configuration in a high-mobility semiconductor heterostructure with scanning gate microscopy
• Variational Scarring in Open Two-Dimensional Quantum Dots
• Asymmetric power dissipation in electronic transport through a quantum point contact
• Accurate characterization of tip-induced potential using electron interferometry
• Scanning gate microscopy in graphene nanostructures
• Theory of ballistic quantum transport in presence of localized defects
• Imaging the localization of the quasi-bound states in graphene antidots
• Conductance microscopy of quantum dots weakly or strongly coupled to the conducting channel
• Imaging spin-resolved cyclotron trajectories in the InSb two-dimensional electron gas
• Fano fingerprints of Majoranas in Kitaev dimers of superconducting adatoms
• Electron paths and double-slit interference in the scanning gate microscopy
• Local bistability under microwave heating for spatially mapping disordered superconductors
• Multitip scanning gate microscopy for ballistic transport studies in systems with two-dimensional electron gas
• Extrinsic thermoelectric response of coherent conductors