Journal
ADVANCED MATERIALS
Volume 30, Issue 44, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201802257
Keywords
silicon quantum electronics; superconductor-semiconductor hybrids
Categories
Funding
- Netherlands Organization for Scientific Research (NWO)
- EC Seventh Framework Programme (FP7-ICT) initiative under Project SiSpin [323841]
- European Research Council
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A Ge-Si core-shell nanowire is used to realize a Josephson field-effect transistor with highly transparent contacts to superconducting leads. By changing the electric field, access to two distinct regimes, not combined before in a single device, is gained: in the accumulation mode the device is highly transparent and the supercurrent is carried by multiple subbands, while near depletion, the supercurrent is carried by single-particle levels of a strongly coupled quantum dot operating in the few-hole regime. These results establish Ge-Si nanowires as an important platform for hybrid superconductor-semiconductor physics and Majorana fermions.
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