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  • Letter

Observation of Aharonov-Bohm effect in PbTe nanowire networks

Zuhan Geng1,*, Zitong Zhang1,*, Fangting Chen1,*, Shuai Yang1,2, Yuying Jiang1, Yichun Gao1, Bingbing Tong2, Wenyu Song1, Wentao Miao1 et al.

Ruidong Li1, Yuhao Wang1, Qinghua Zhang3, Fanqi Meng3, Lin Gu3, Kejing Zhu2, Yunyi Zang2, Lin Li2, Runan Shang2, Xiao Feng1,2,4, Qi-Kun Xue1,2,4,5, Ke He1,2,4,†, and Hao Zhang1,2,4,‡

  • 1State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China
  • 2Beijing Academy of Quantum Information Sciences, Beijing 100193, China
  • 3Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 4Frontier Science Center for Quantum Information, Beijing 100084, China
  • 5Southern University of Science and Technology, Shenzhen 518055, China

  • *These authors contributed equally to this paper.
  • †kehe@tsinghua.edu.cn
  • ‡hzquantum@mail.tsinghua.edu.cn

Phys. Rev. B 105, L241112 – Published 22 June, 2022

DOI: https://doi.org/10.1103/PhysRevB.105.L241112

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 ∼812μm at 50 mK. This length scale is larger than the typical geometry of PbTe-based hybrid semiconductor-superconductor nanowire devices.

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