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- W3047286046 abstract "Tunneling conductance spectroscopy in normal metal-superconductor junctions is an important tool for probing Andreev bound states in mesoscopic superconducting devices, such as Majorana nanowires. In an ideal superconducting device, the subgap conductance obeys specific symmetry relations, due to particle-hole symmetry and unitarity of the scattering matrix. However, experimental data often exhibits deviations from these symmetries or even their explicit breakdown. In this work, we identify a mechanism that leads to conductance asymmetries without quasiparticle poisoning. In particular, we investigate the effects of finite bias and include the voltage dependence in the tunnel barrier transparency, finding significant conductance asymmetries for realistic device parameters. It is important to identify the physical origin of conductance asymmetries: in contrast to other possible mechanisms such as quasiparticle poisoning, finite-bias effects are not detrimental to the performance of a topological qubit. To that end we identify features that can be used to experimentally determine whether finite-bias effects are the source of conductance asymmetries." @default.
- W3047286046 created "2020-08-10" @default.
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- W3047286046 date "2021-02-16" @default.
- W3047286046 modified "2023-09-23" @default.
- W3047286046 title "Conductance asymmetries in mesoscopic superconducting devices due to finite bias" @default.
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- W3047286046 doi "https://doi.org/10.21468/scipostphys.10.2.037" @default.
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