We report on the realization of Nb-based all-metallic Dayem nano-bridge gate-controlled
transistors (Nb-GCTs). These Josephson devices operate up to a temperature of∼ 3 K and …

Two different types of Cooper pair transistors, with Al and Nb islands, have been
investigated in a tunable electromagnetic environment. The device with an Al island …

We study adiabatic charge transfer in a superconducting Cooper-pair pump, focusing on the
influence of current measurement on coherence. We investigate the limit where the …

Deep submicron Nb/AlO x/Nb tunnel junctions and single electron transistors were
fabricated by electron beam gun shadow evaporation, using stencil masks consisting of the …

We have developed a fabrication process for nanoscale tunnel junctions which includes
focused-ion-beam etching from different directions. By applying the process to a Nb/(Al–) Al …

We have fabricated and measured superconducting single-electron transistors with Al leads
and Nb islands. At bias voltages below the gap of Nb we observe clear signatures of …

The vortex charge for a thin mesoscopic superconducting ring is investigated by the
phenomenological Ginzburg-Landau theory with the de Gennes boundary condition. The …

We have investigated charge transport in ultrasmall superconducting single and double
Josephson junctions coupled to resonant modes of the electromagnetic environment. We …

We have fabricated Nb/(Al-) AlOx/Nb junctions with a single electron transistor (SET)
geometry using conventional e-beam lithographic technique. It was possible to reach a …

We have developed a technique to fabricate sub-micron, $0.6\,\mu {\rm {m}}\times 0.6\,\mu
{\rm {m}} $ Al–AlOx–Nb tunnel junctions using a standard e-beam resist, angle evaporation …