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 nontopological 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 2 e2 /h, the situation with more coupled Majorana states is distinctively different with both zeros and 2 e2 /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.
| Original language | English |
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| Journal | Physical Review B Condensed Matter |
| Volume | 82 |
| Issue number | 18 |
| Pages (from-to) | 180516 (R) |
| Number of pages | 4 |
| ISSN | 0163-1829 |
| DOIs | |
| Publication status | Published - 22 Nov 2010 |