Observation of Aharonov-Bohm effect in PbTe nanowire networks

Abstract

We report phase coherent electron transport in PbTe nanowire networks with a loop geometry. Magneto-conductance shows Aharonov-Bohm (AB) oscillations with periods of $h/e$ and $h/2e$ in flux. The amplitude of $h/2e$ oscillations is enhanced near zero magnetic field, possibly due to interference between time-reversal paths. Temperature dependence of the AB amplitudes suggests a phase coherence length $\sim$ 8 - 12 $\mu$m at 50 mK. This length scale is larger than the typical geometry of PbTe-based hybrid semiconductor-superconductor nanowire devices.

Raw data and processing codes within this paper are available at https://zenodo.org/record/5798424

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• Reducing disorder in PbTe nanowires for Majorana research
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• Anisotropy of PbTe nanowires with and without a superconductor
• Enhanced superconductivity in PbTe-In hybrids
• Strong enhancement of g-factor in PbTe-Pb hybrid nanowires
• Presence versus absence of charging energies in PbTe quantum dots