Molybdenum disulfide MoS 2 is often discussed as a groundbreaking material for electronics applications. As bulk crystal or as 2D layer material similar to graphene, it is an excellent semiconductor with strong spin-orbit interaction. At strong doping it even becomes intrinsically superconducting, with possibly interesting topological properties.
So how about using MoS 2 for quantum electronics, single electron devices, or (charge, spin, or valley) qubits? There's already enough science fiction literature out there mentioning "molycircuits"... Well, a small problem stands in the way. It turns out that the electronic band structure of the material makes reaching quantum confinement, i.e., discrete, addressable electronic quantum states, quite hard. The chip structures need to be built at very small scale, difficult to reach with MoS 2 flakes on a ch
That's exactly why we are interested in MoS 2 nanotubes. They can be grown clean and straight, with diameters down to 20nm - which automatically confines charge carriers in one more direction compared to a two-dimensional MoS 2 flake. What remains is to restrict motion of the charge carriers along the nanotube axis and to make good metallic contacts. However, it turns out that making good contacts to MoS 2 is hard - either your metals form a Schottky barrier, or they react with the MoS 2 and destroy its cry