Large Andreev bound state zero bias peaks in a weakly dissipative environment

Abstract

We study Andreev bound states in hybrid InAs-Al nanowire devices. The energy of these states can be tuned to zero by gate voltage or magnetic field, revealing large zero bias peaks (ZBPs) near 2e^2/h in tunneling conductance. Probing these large ZBPs using a weakly dissipative lead reveals non-Fermi liquid temperature (T) dependence due to environmental Coulomb blockade (ECB), an interaction effect from the lead acting on the nanowire junction. By increasing T, these large ZBPs either show a height increase or a transition from split peaks to a ZBP, both deviate significantly from non-dissipative devices where a Fermi-liquid T dependence is revealed. Our result demonstrates the competing effect between ECB and thermal broadening on Andreev bound states.

arXiv commentRaw data and processing codes are available at https://doi.org/10.5281/zenodo.6123849

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• Differential current noise as an identifier of Andreev bound states that induce nearly quantized conductance plateaus
• In situ tuning of dynamical Coulomb blockade on Andreev bound states in hybrid nanowire devices
• Theoretical proposal to obtain strong Majorana evidence from scanning tunneling spectroscopy of a vortex with a dissipative environment
• Properties of dissipative Floquet Majorana modes using a quantum dot
• Influence of topological degeneracy on the boundary Berezinskii-Kosterlitz-Thouless quantum phase transition of a dissipative resonant level
• Coulomb blockade in open superconducting islands on InAs nanowires
• Growth and fabrication of advanced PbTe-Pb quantum devices