# Single charge transport in a fully superconducting SQUISET locally tuned by self-inductance effects

## TL;DR

This paper introduces a fully superconducting SQUISET device that uses self-inductance effects for local, independent control of charge states and conductance, enhancing single-electron manipulation and magnetic flux sensing capabilities.

## Contribution

The work demonstrates a novel fully superconducting SQUISET with independently tunable charge and conductance via self-inductance, improving device flexibility and control.

## Key findings

- Sensitive to single charge states and magnetic fields
- Robust modulation of current-to-flux transfer function
- Independent control of conductance in nano-engineered junctions

## Abstract

We present a single-electron device for the manipulation of charge states via quantum interference in nanostructured electrodes. Via self-inductance effects, we induce two independent magnetic fluxes in the electrodes and we demonstrate sensitivity to single charge states and magnetic field at variable temperature. Moreover, our approach allows us to demonstrate local and independent control of the single-particle conductance between nano-engineered tunnel junctions in a fully-Superconducting Quantum Interference Single-Electron Transistor (SQUISET), thereby increasing the flexibility of our single-electron transistors. Our devices show a robust modulation of the current-to-flux transfer function via control currents, while exploiting the single-electron filling of a mesoscopic superconducting island. Further applications of the device concept to single-charge manipulation and magnetic-flux sensing are also discussed.