We demonstrate long-range superconducting correlations in a several micrometer-long carbon nanotube encapsulated in a van der Waals stack between hBN and NbSe2. We show that a substantial supercurrent flows through the nanotube section beneath the NbSe2 crystal as well as through the 2 μm-long section not in contact with it. As expected for superconductors of nanoscopic cross section, the current-induced breakdown of superconductivity is characterized by resistance steps due to the nucleation of phase slip centers. All elements of our hybrid device are active building blocks of several recently proposed setups for realization of Majorana fermions in carbon nanotubes.
@article{arxiv.2010.07755,
title = {Supercurrent and phase slips in a ballistic carbon nanotube embedded into a van der Waals heterostructure},
author = {Christian Bäuml and Lorenz Bauriedl and Magdalena Marganska and Milena Grifoni and Christoph Strunk and Nicola Paradiso},
journal= {arXiv preprint arXiv:2010.07755},
year = {2021}
}