We report the experimental observation of Ising superconductivity in 3-dimensional NbSe2 stacked with single-layer MoS2. The angular dependence of the upper critical magnetic field and the temperature dependence of the upper parallel critical field confirm the appearance of two-dimensional Ising superconductivity in the 3-dimensional NbSe2 with single-layer MoS2 overlay. We show that the superconducting phase has strong Ising spin-orbit correlations which make the holes spin non-degenerate. Our observation of Ising superconductivity in heterostructures of few-layer NbSe2 of thickness ~ 15 nm with single-layer MoS2 raises the interesting prospect of observing topological chiral superconductors with nontrivial Chern numbers in a momentum-space spin-split fermionic system.
@article{arxiv.2111.06681,
title = {Transition from three- to two-dimensional Ising superconductivity in few-layer NbSe2 by proximity effect from van der Waals heterostacking},
author = {Prakiran Baidya and Divya Sahani and Hemanta Kumar Kundu and Simrandeep Kaur and Priya Tiwari and Vivas Bagwe and John Jesudasan and Awadhesh Narayan and Pratap Raychaudhuri and Aveek Bid},
journal= {arXiv preprint arXiv:2111.06681},
year = {2021}
}