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arXiv · 2404.06899

SQUID oscillations in PbTe nanowire networks

Yichun Gao·Wenyu Song·Zehao Yu·Shuai Yang·Yuhao Wang·Ruidong Li·Fangting Chen·Zuhan Geng·Lining Yang·Jiaye Xu·Zhaoyu Wang·Zonglin Li·Shan Zhang·Xiao Feng·Tiantian Wang·Yunyi Zang·Lin Li·Runan Shang·Qi-Kun Xue·Ke He·Hao Zhang
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Abstract

Network structures by semiconductor nanowires hold great promise for advanced quantum devices, especially for applications in topological quantum computing. In this study, we created networks of PbTe nanowires arranged in loop configurations. Using shadow-wall epitaxy, we defined superconducting quantum interference devices (SQUIDs) using the superconductor Pb. These SQUIDs exhibit oscillations in supercurrent upon the scanning of a magnetic field. Most of the oscillations can be fitted assuming a sinusoidal current-phase relation for each Josephson junction. Under certain conditions, the oscillations are found to be skewed, suggesting possible deviation from a sinusoidal behavior. Our results highlight the potential of PbTe nanowires for building complex quantum devices in the form of networks.

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Yichun Gao, Wenyu Song, Zehao Yu, Shuai Yang, Yuhao Wang, Ruidong Li, Fangting Chen, Zuhan Geng, Lining Yang, Jiaye Xu, Zhaoyu Wang, Zonglin Li, Shan Zhang, Xiao Feng, Tiantian Wang, Yunyi Zang, Lin Li, Runan Shang, Qi-Kun Xue, Ke He, Hao Zhang. 2024-04-10. SQUID oscillations in PbTe nanowire networks. https://doi.org/10.1103/physrevb.110.045405

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