Transition from three- to two-dimensional Ising superconductivity in few-layer NbSe2 by proximity effect from van der Waals heterostacking

Prakiran Baidya, Divya Sahani, Hemanta Kumar Kundu, Simrandeep Kaur, Priya Tiwari, Vivas Bagwe, John Jesudasan, Awadhesh Narayan, Pratap Raychaudhuri, Aveek Bid
2021 Physical review B  
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
more » ... 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.
doi:10.1103/physrevb.104.174510 fatcat:3ivq5nibnfdyfbj4czeuuu4zlq