Journal
SCIENCE
Volume 354, Issue 6319, Pages 1557-1562Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaf3961
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Funding
- Microsoft Research
- Project Q
- Danish National Research Foundation
- Villum Foundation
- European Commission
- Crafoord Foundation
- Swedish Research Council (VR)
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Hybrid nanowires combining semiconductor and superconductor materials appear well suited for the creation, detection, and control of Majorana bound states (MBSs). We demonstrate the emergence of MBSs from coalescing Andreev bound states (ABSs) in a hybrid InAs nanowire with epitaxial Al, using a quantum dot at the end of the nanowire as a spectrometer. Electrostatic gating tuned the nanowire density to a regime of one or a few ABSs. In an applied axial magnetic field, a topological phase emerges in which ABSs move to zero energy and remain there, forming MBSs. We observed hybridization of the MBS with the end-dot bound state, which is in agreement with a numerical model. The ABS/MBS spectra provide parameters that are useful for understanding topological superconductivity in this system.
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