Experiments On Charge-Transfer Across Coulomb Islands

Preliminary experiments on controlled charge transfer across tunnel junctions of small aluminium islands have been performed. We fabricate samples by conventional e-beam lithography using a converted SEM and measurements are carried out in a compact plastic dilution refrigerator fitting inside a 2'' necked transport dewar. Experiments to test the effect of a coherent electro-acoustic wave on the I-V curve are in progress.