期刊
PHYSICAL REVIEW B
卷 82, 期 18, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.180516
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资金
- Danish Council for Independent Research verbar Natural Sciences
- Microsoft Corporation
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 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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