Imaging signatures of the local density of states in an electronic cavity
arXiv:2011.13869 · doi:10.1103/PhysRevResearch.3.L032005
Abstract
We use Scanning Gate Microscopy to study electron transport through an open, gate-defined resonator in a Ga(Al)As heterostructure. Raster-scanning the voltage-biased metallic tip above the resonator, we observe distinct conductance modulations as a function of the tip-position and voltage. Quantum mechanical simulations reproduce these conductance modulations and reveal their relation to the partial local density of states in the resonator. Our measurements illustrate the current frontier between possibilities and limitations in imaging the local density of states in buried electron systems using scanning gate microscopy.
References in corpus (9)
- Imaging Magnetic Focusing of Coherent Electron Waves
- Unexpected features of branched flow through high-mobility two-dimensional electron gases
- Imaging Electron Wave Functions Inside Open Quantum Rings
- Local Density of States in Mesoscopic Samples from Scanning Gate Microscopy
- Measurement of the Tip-Induced Potential in Scanning Gate Experiments
- Partial local density of states from scanning gate microscopy
- Manipulating quantum Hall edge channels in graphene through Scanning Gate Microscopy
- Interference Effects in a Tunable Quantum Point Contact Integrated with an Electronic Cavity
- Signatures of folded branches in the scanning gate microscopy of ballistic electronic cavities