Journal
PHYSICAL REVIEW LETTERS
Volume 106, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.077003
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- RFBR [10-02-00554]
- RAS
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We propose a setup involving Majorana bound states (MBS) hosted by a vortex on a superconducting surface of a 3D topological insulator (TI). We consider a narrow channel drilled across a TI slab with both sides covered by s-wave superconductor. In the presence of a vortex pinned to such a channel, it acts as a ballistic nanowire connecting the superconducting surfaces, with a pair of MBS localized in it. The energies of the MBS possess a 4 pi-periodic dependence on the superconductive phase difference phi between the surfaces. It results in the appearance of an anomalous term in the current-phase relation I-a(phi) for the supercurrent flowing along the channel between the superconductive surfaces. We have calculated the shape of the 4 pi-periodic function I-a(phi), as well as the dependence of its amplitude on temperature and system parameters.
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