Universal conductance scaling of Andreev reflections using a dissipative probe

Abstract

The Majorana search is caught up in an extensive debate about the false-positive signals from non-topological Andreev bound states (ABSs). We introduce a remedy using the dissipative probe to generate electron-boson interaction. We theoretically show that the interaction-induced renormalization leads to significantly distinct universal zero-bias conductance behaviors, i.e. distinct characteristic power-law in temperature, for different types of Andreev reflections, which shows a sharp contrast to that of a Majorana zero mode. Various specific cases have been studied, including the cases that two charges involved in an Andreev reflection process maintain/lose coherence, and the cases for multiple ABSs with or without a Majorana present. A transparent list of conductance features in each case is provided to help distinguishing the observed subgap states in experiments, which also promotes the identification of Majorana zero modes.

15 pages, 4 figures, 1 talbe, with text, figures and reference updated

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Cited by in corpus (13)

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• Plateau regions for zero-bias peaks within 5% of the quantized conductance value $2e^2/h$
• Recent progress on Majorana in semiconductor-superconductor heterostructures--Engineering and detection
• Anomalous Andreev Spectrum and Transport in Non-Hermitian Josephson Junctions
• Non-hermitian topology in multiterminal superconducting junctions
• Differential current noise as an identifier of Andreev bound states that induce nearly quantized conductance plateaus
• Large Andreev bound state zero bias peaks in a weakly dissipative environment
• Probing electron-hole weights of an Andreev bound state by transient currents
• Do Majorana zero modes emerge in the hybrid nanowire under a strong magnetic field?
• Exceptional Andreev spectrum and supercurrent in p-wave non-Hermitian Josephson junctions
• Theoretical proposal to obtain strong Majorana evidence from scanning tunneling spectroscopy of a vortex with a dissipative environment
• In situ tuning of dynamical Coulomb blockade on Andreev bound states in hybrid nanowire devices
• Influence of topological degeneracy on the boundary Berezinskii-Kosterlitz-Thouless quantum phase transition of a dissipative resonant level