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I will present results from two different research directions. First, I will focus on gate defined quantum dots in bilayer graphene, which are promising hosts for spin and valley qubits. I will discuss the single particle spectrum, spin and valley relaxation times, and how the electron-hole symmetry leads to a protected spin and valley blockade allowing for readout of spin and valley states. The second part will focus on Josephson junction arrays (JJAs) based on a superconductor/ semiconductor hybrid material. Magnetic fields induce frustration, leading to complex ground states such as vortex lattices and liquids, depending on the lattice geometry. I will present our efforts to map out the phase diagram of JJAs with dice lattice geometry, which are predicted to host flat bands when fully frustrated.

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Luca Banszerus, Niels Bohr Institute, Copenhagen
Seminar Room of the Institute of Physics II
Contact: Erwann/Matteo