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| Contact |
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Jacquod Philippe |
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| Title |
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Signatures of Majorana fermions in hybrid normal-superconducting rings |
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| Author(s) |
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Jacquod P., Büttiker M. |
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| References |
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Physical Review B 88, 241409 (R), December 2013 |
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| Url |
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http://prb.aps.org/toc/PRB/v88/i24 |
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| Abstract |
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We investigate persistent currents in metallic rings interrupted by a Coulomb-blockaded topological superconducting segment. We show that the presence of Majorana bound states in the superconductor is reflected in the emergence of an h/e harmonic in the persistent current. The Majorana bound states further render the current finite at zero flux, with a sign that is determined by the fermion parity of the superconductor. The resulting peculiar symmetry of the persistent current is compatible with a free energy that is even in time-reversal symmetry-breaking fields. These unique features of the persistent currents are robust against disorder and provide unambiguous signatures of the presence of Majorana fermions. |
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