期刊
NATURE
卷 548, 期 7668, 页码 434-+出版社
NATURE PORTFOLIO
DOI: 10.1038/nature23468
关键词
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资金
- European Research Council [ERC HELENA 617256]
- Dutch Organization for Scientific Research [NWO-VICI 700.10.441]
- Foundation for Fundamental Research on Matter (FOM)
- Microsoft Corporation Station-Q
- Solliance, a solar energy R&D initiative of ECN
- TNO
- Holst
- TU/e
- imec
- Forschungszentrum Julich
- Dutch province of Noord-Brabant
- Office of Naval Research (ONR)
- Microsoft Research
Semiconductor nanowires are ideal for realizing various low-dimensional quantum devices. In particular, topological phases of matter hosting non-Abelian quasiparticles (such as anyons) can emerge when a semiconductor nanowire with strong spin-orbit coupling is brought into contact with a superconductor(1,2). To exploit the potential of non-Abelian anyons-which are key elements of topological quantum computing-fully, they need to be exchanged in a well-controlled braiding operation(3-8). Essential hardware for braiding is a network of crystalline nanowires coupled to superconducting islands. Here we demonstrate a technique for generic bottom-up synthesis of complex quantum devices with a special focus on nanowire networks with a predefined number of superconducting islands. Structural analysis confirms the high crystalline quality of the nanowire junctions, as well as an epitaxial superconductor-semiconductor interface. Quantum transport measurements of nanowire 'hashtags' reveal Aharonov-Bohm and weak-antilocalization effects, indicating a phase-coherent system with strong spin-orbit coupling. In addition, a proximity-induced hard superconducting gap (with vanishing sub-gap conductance) is demonstrated in these hybrid superconductor-semiconductor nanowires, highlighting the successful materials development necessary for a first braiding experiment. Our approach opens up new avenues for the realization of epitaxial three-dimensional quantum architectures which have the potential to become key components of various quantum devices.
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