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.
@article{arxiv.2404.06899,
title = {SQUID oscillations in PbTe nanowire networks},
author = {Yichun Gao and Wenyu Song and Zehao Yu and Shuai Yang and Yuhao Wang and Ruidong Li and Fangting Chen and Zuhan Geng and Lining Yang and Jiaye Xu and Zhaoyu Wang and Zonglin Li and Shan Zhang and Xiao Feng and Tiantian Wang and Yunyi Zang and Lin Li and Runan Shang and Qi-Kun Xue and Ke He and Hao Zhang},
journal= {arXiv preprint arXiv:2404.06899},
year = {2024}
}