A ballistic two-dimensional-electron-gas Andreev interferometer

Abstract

We report the realization and investigation of a ballistic Andreev interferometer based on an InAs two dimensional electron gas coupled to a superconducting Nb loop. We observe strong magnetic modulations in the voltage drop across the device due to quasiparticle interference within the weak-link. The interferometer exhibits flux noise down to $\sim 80\mu {\Phi }_0/\sqrt{\text{Hz}}$, and a robust behavior in temperature with voltage oscillations surviving up to $\sim 7$K. Besides this remarkable performance, the device represents a crucial first step for the realization of a fully-tunable ballistic superconducting magnetometer and embodies a potential new platform for the investigation of Majorana bound states as well as non-local entanglement of Cooper pairs.

4+ pages, 4 color figures

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Cited by in corpus (10)

• Quantum Hall Effect in a Josephson Junction
• Coherent Josephson thermodynamic cycles
• Majorana bound states in hybrid 2D Josephson junctions with ferromagnetic insulators
• Full electrostatic control of quantum interference in an extended trenched Josephson junction
• Hybrid normal-superconducting Aharonov-Bohm quantum thermal device
• InAs on Insulator: A New Platform for Cryogenic Hybrid Superconducting Electronics
• Superconducting Quantum Interference Devices based on InSb nanoflag Josephson junctions
• High-performance Andreev interferometer-based electronic coolers
• Josephson quantum spin thermodynamics
• Investigation of InAs based devices for topological applications