Evidence for s-wave Pairing with Atomic Scale Disorder in the van der Waals Superconductor NaSn2As2

K. Ishihara, T. Takenaka, Y. Miao +8

The recent discovery of superconductivity in NaSn${}_2$As${}_2$ with a van der Waals layered structure raises immediate questions on its pairing mechanism and underlying electronic str…