Josephson effect in a few-hole quantum dot Ridderbos, Joost Brauns, Matthias Shen, Jie de Vries, Folkert K. Li, Ang Bakkers, Erik P. A. M. Brinkman, Alexander Zwanenburg, Floris A. 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. Wiley 2018 info:eu-repo/semantics/article doc-type:article text http://purl.org/coar/resource_type/c_2df8fbb1 https://research-explorer.ista.ac.at/record/5990 Ridderbos J, Brauns M, Shen J, et al. Josephson effect in a few-hole quantum dot. <i>Advanced Materials</i>. 2018;30(44). doi:<a href="https://doi.org/10.1002/adma.201802257">10.1002/adma.201802257</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1002/adma.201802257 info:eu-repo/semantics/altIdentifier/issn/0935-9648 info:eu-repo/semantics/altIdentifier/wos/000450232800015 info:eu-repo/semantics/altIdentifier/arxiv/1809.08487 info:eu-repo/semantics/openAccess