Tunneling characteristic of a chain of Majorana bound states

Karsten Flensberg

doi:10.1103/physrevb.82.180516

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arXiv · 1009.3533

Tunneling characteristic of a chain of Majorana bound states

Karsten Flensberg

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Abstract

We consider theoretically tunneling characteristic of a junction between a normal metal and a chain of coupled Majorana bound states generated at crossings between topological and non-topological superconducting sections, as a result of, for example, disorder in nanowires. While an isolated Majorana state supports a resonant Andreev process, yielding a zero bias differential conductance peak of height 2e^2/h, the situation with more coupled Majorana states is distinctively different with both zeros and 2e^2/h peaks in the differential conductance. We derive a general expression for the current between a normal metal and a network of coupled Majorana bound states and describe the differential conductance spectra for a generic set of situations, including regular, disordered, and infinite chains of bound states.

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Karsten Flensberg. 2010-09-18. Tunneling characteristic of a chain of Majorana bound states. https://doi.org/10.1103/physrevb.82.180516

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