Proximity effect in PbTe-Pb hybrid nanowire Josephson junctions

Abstract

Semiconductor-superconductor hybrid nanowires are a leading material platform for the realization of Majorana zero modes. The semiconductors in previous studies are dominantly InAs or InSb. In this work, we show the induced superconductivity in a PbTe nanowire epitaxially coupled to a superconductor Pb. The Josephson junction device based on this hybrid reveals a gate-tunable supercurrent in the open regime and a hard superconducting gap in the tunneling regime. By demonstrating the superconducting proximity effect, our result can enable Majorana searches and other applications like gate-tunable qubits in a new semiconductor system.

Raw data and processing codes within this paper are available at: https://doi.org/10.5281/zenodo.7398019

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Cited by in corpus (17)

• Ballistic PbTe Nanowire Devices
• Progress in superconductor-semiconductor topological Josephson junctions
• Selective-Area-Grown PbTe-Pb Planar Josephson Junctions for Quantum Devices
• Evidence for $\pi$-shifted Cooper quartets and few-mode transport in PbTe nanowire three-terminal Josephson junctions
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• Presence versus absence of charging energies in PbTe quantum dots
• Excess photon-assisted noise of Majorana and Andreev bound states