Tunnel conductance spectroscopy via harmonic generation in a hybrid capacitor device

Abstract

We address the measurement of density of states within and beyond the superconducting gap in tunnel-coupled finite-size nanostructures using a capacitive method. Third-harmonic generation is used to yield the full differential conductance spectrum without destruction of the low dimensionality otherwise induced by intimate ohmic coupling to an electrode. The method is particularly relevant to attempts to discern the presence of the fragile Majorana quasiparticle at the end of spin-orbit-coupled nanowires in appropriate magnetic field conditions by their signature mid-gap density of states.

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References in corpus (11)

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Cited by in corpus (8)

• Wireless Majorana Bound States: From Magnetic Tunability to Braiding
• Detecting Majoranas in 1D wires by charge sensing
• Magnetic Field Response and Chiral Symmetry of Time Reversal Invariant Topological Superconductors
• Non-locality of zero-bias anomalies in the topologically-trivial phase of Majorana wires
• Tunneling transport in NSN junctions made of Majorana nanowires across the topological quantum phase transition
• Electrical detection of topological quantum phase transitions in disordered Majorana nanowires
• Probing Majorana-like states in quantum dots and quantum rings
• Majorana fermions in quasi-1D and higher dimensional ultracold fermionic optical lattices