Séminaire Nanoélectronique Quantique : Tobias Krähenmann

14h00 // Salle « Remy Lemaire » (K223)

Institut Néel 25 avenue des martyrs - Grenoble

Electron Transfer between Quantum Dots
Tobias Krähenmann (ETH Zurich)

Spatially separated quantum dots are used to transfer electrons in a high-mobility two-dimensional electron gas. We utilize the quantized energy levels of quantum dots to spectroscopically examine this transfer. Applying a perpendicular magnetic field enhances the transfer between the two quantum dots, as long as the chirality of the edge channels match the transfer direction. The transport of electrons in edge channels implicates a longer transfer time, which favors inelastic processes and we measure an enhancement of electron-electron scattering events. In a magnetic field we observe that the dissipation energy of electrons tunneling through a quantum dot can be released in an Auger-like recombination which can be investigated using quantum dot devices.

Contact : Tobias Krähenmann

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