期刊
PHYSICAL REVIEW B
卷 103, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.103.014510
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资金
- Dutch Ministry of Economic Affairs
- Netherlands Organisation for Scientific Research (NWO/OCW) through VIDI [680-47-537]
- Microsoft Research
The study reveals that the contribution of Majorana to the supercurrent can be activated when time-reversal symmetry in the conventional lead is broken. Moreover, there will be a Majorana-induced anomalous supercurrent when the magnetic field has a component in the direction of the effective spin-orbit field. These findings highlight the characteristic behaviors of Majorana zero modes that can be accessed with devices having only superconducting contacts.
We study the equilibrium dc Josephson current in a junction between an s-wave and a topological superconductor. Cooper pairs from the s-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode localized near the junction or via the above-gap continuum states. We find that theMajorana contribution to the supercurrent can be switched on when time-reversal symmetry in the conventional lead is broken, e.g., by an externally applied magnetic field inducing a Zeeman splitting. Moreover, if the magnetic field has a component in the direction of the effective spin-orbit field, there will be a Majorana-induced anomalous supercurrent at zero phase difference. These behaviors may serve as a signature characteristic of Majorana zero modes and are accessible to devices with only superconducting contacts.
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