Observation of Aharonov-Bohm effect in PbTe nanowire networks
Zuhan Geng, Zitong Zhang, Fangting Chen, Shuai Yang, Yuying Jiang, Yichun Gao, Bingbing Tong, Wenyu Song, Wentao Miao, Ruidong Li, Yuhao Wang, Qinghua Zhang, Fanqi Meng, Lin Gu, Kejing Zhu, Yunyi Zang, Lin Li, Runan Shang, Xiao Feng, Qi-Kun Xue, Ke He, Hao Zhang
Abstract
We report phase coherent electron transport in PbTe nanowire networks with a loop geometry. Magnetoconductance shows Aharonov-Bohm (AB) oscillations with periods of $h/e$ and $h/2e$ in flux. The amplitudes of $h/2e$ oscillations are enhanced near zero magnetic field, possibly due to interference between time-reversal paths. Temperature dependence of the AB amplitudes suggests a phase coherence length $\ensuremath{\sim}8\text{}12\phantom{\rule{4pt}{0ex}}\ensuremath{\mu}\mathrm{m}$ at 50 mK. This length scale is larger than the typical geometry of PbTe-based hybrid semiconductor-superconductor nanowire devices.