Journal
PHYSICAL REVIEW B
Volume 85, Issue 8, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.085415
Keywords
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Funding
- Natural Science Foundation of China [11074266, 61131006, 60721004]
- Important National Science and Technology Specific Projects [2011ZX02707]
- CAS
- Shanghai Municipal Commission of Science and Technology [10JC1417000]
- [YYYJ-1123-1]
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We investigate the transport of a topological superconducting wire hosting a pair of Majorana bound states between two normal leads. Both the model-independent scattering matrix theory and the Green's function method for a tight-binding model show that the transport properties are sensitive to the coupling configurations. Unlike the single-lead situation, the differential conductance peak fixes at zero bias until the coupling between the two Majorana bound states exceeds a critical value, which is determined by the coupling strengths to the leads. While the current noise Fano factor for single-lead devices reaches 2 at low bias due to the resonant Andreev reflection, it is significantly reduced by a finite though small coupling to the second lead. These observations provide clear transport signatures of Majorana bound states for different coupling configurations.
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