6533b7d9fe1ef96bd126d7cf
RESEARCH PRODUCT
Mapping an electron wave function by a local electron scattering probe
Werner WegscheiderThomas TschirkyTimo HyartWerner DietscheWerner DietscheChristian Reichlsubject
2DEG; Heterostructures; Electron wave function; GaAs/AlGaAs; Electron scatteringFOS: Physical sciencesGeneral Physics and Astronomychemistry.chemical_element02 engineering and technologyElectronQuantum Hall effect01 natural sciencesGaAs/AlGaAsElectron wave functionAluminiumPosition (vector)2DEGMesoscale and Nanoscale Physics (cond-mat.mes-hall)0103 physical sciencesPerpendicularHeterostructuresElectron scattering010306 general physicsWave functionPhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physics021001 nanoscience & nanotechnologyAmplitudechemistryheterostructureselectron scattering0210 nano-technologyElectron scatteringelectron wave functiondescription
A technique is developed which allows for the detailed mapping of the electronic wave function in two-dimensional electron gases with low-temperature mobilities up to $15\times {10}^{6}\;{\mathrm{cm}}^{2}\;{{\rm{V}}}^{-1}\;{{\rm{s}}}^{-1}$. Thin ('delta') layers of aluminium are placed into the regions where the electrons reside. This causes electron scattering which depends very locally on the amplitude of the electron wave function at the position of the Al δ-layer. By changing the distance of this layer from the interface we map the shape of the wave function perpendicular to the interface. Despite having a profound effect on the electron mobiliy, the δ-layers do not cause a widening of the quantum Hall plateaus.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-10-27 |