Journal
NATURE PHYSICS
Volume 8, Issue 12, Pages 887-895Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS2479
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Funding
- Israeli Science Foundation (ISF)
- Minerva foundation
- US-Israel Bi-National Science Foundation (BSF)
- European Research Council under the European Community [227716]
- Israeli Ministry of Science and Technology (IMOST)
- European Research Council (ERC) [227716] Funding Source: European Research Council (ERC)
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Majorana fermions are the only fermionic particles that are expected to be their own antiparticles. Although elementary particles of the Majorana type have not been identified yet, quasi-particles with Majorana-like properties, born from interacting electrons in the solid, have been predicted to exist. Here, we present thorough experimental studies, backed by numerical simulations, of a system composed of an aluminium superconductor in proximity to an indium arsenide nanowire, with the latter possessing strong spin-orbit coupling and Zeeman splitting. An induced one-dimensional topological superconductor, supporting Majorana fermions at both ends, is expected to form. We concentrate on the characteristics of a distinct zero-bias conductance peak and its splitting in energy-both appearing only with a small magnetic field applied along the wire. The zero-bias conductance peak was found to be robustly tied to the Fermi energy over a wide range of system parameters. Although not providing definite proof of a Majorana state, the presented data and the simulations support its existence.
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