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arXiv · 2212.02132

Proximity effect in PbTe-Pb hybrid nanowire Josephson junctions

Zitong Zhang·Wenyu Song·Yichun Gao·Yuhao Wang·Zehao Yu·Shuai Yang·Yuying Jiang·Wentao Miao·Ruidong Li·Fangting Chen·Zuhan Geng·Qinghua Zhang·Fanqi Meng·Ting Lin·Lin Gu·Kejing Zhu·Yunyi Zang·Lin Li·Runan Shang·Xiao Feng·Qi-Kun Xue·Ke He·Hao Zhang
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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.

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Zitong Zhang, Wenyu Song, Yichun Gao, Yuhao Wang, Zehao Yu, Shuai Yang, Yuying Jiang, Wentao Miao, Ruidong Li, Fangting Chen, Zuhan Geng, Qinghua Zhang, Fanqi Meng, Ting Lin, Lin Gu, Kejing Zhu, Yunyi Zang, Lin Li, Runan Shang, Xiao Feng, Qi-Kun Xue, Ke He, Hao Zhang. 2022-12-05. Proximity effect in PbTe-Pb hybrid nanowire Josephson junctions. https://doi.org/10.1103/physrevmaterials.7.086201

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