Phase-Dependent Resistance in a Superconductor-Two-Dimensional-Electron-Gas Quasiparticle Interferometer

Abstract

We have investigated the interplay between Josephson coupling and quasiparticle interference effects in the resistance of a two-dimensional electron gas connected to superconducting electrodes with an interrupted ring geometry. By reducing the influence of the Josephson coupling strength at high dc current bias and large interelectrode spacing, we observed magneto-oscillations in the resistance with a period $\frac{h}{2e}$, which we attribute to quasiparticle interference.