The paper by Georgios Katsaros et al. Hybrid superconductor–semiconductor devices made from self-assembled SiGe nanocrystals on silicon, makes the cover of the last issue of Nature Nanotechnology.
This work, co-signed by INAC/SPSMS, IFW Dresden, Léti and Institut Néel, deals with electronic transport in SiGe self-assembled nanocrystals, individually connected to aluminum leads. At very low temperature, a hybrid superconductor-semiconductor device is realized, in which a resonant supercurrent is observed, i.e. the tunnelling of Copper pairs through the nanocrystal for some values of the grid voltage.