Imaging Electron Wave Functions Inside Open Quantum Rings

Martins, F.; Hackens, B.; Pala, M. G.; Ouisse, T.; Sellier, H.; Wallart, X.; Bollaert, S.; Cappy, A.; Chevrier, J.; Bayot, V.; Huant, S.

Imaging Electron Wave Functions Inside Open Quantum Rings

Authors

Description

Combining Scanning Gate Microscopy (SGM) experiments and simulations, we demonstrate low temperature imaging of electron probability density $|Ψ|^{2}(x,y)$ in embedded mesoscopic quantum rings (QRs). The tip-induced conductance modulations share the same temperature dependence as the Aharonov-Bohm effect, indicating that they originate from electron wavefunction interferences. Simulations of both $|Ψ|^{2}(x,y)$ and SGM conductance maps reproduce the main experimental observations and link fringes in SGM images to $|Ψ|^{2}(x,y)$.
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