A largely investigated TMD is 2H-MoS2. The reported experiments show the mobility of its monolayers "several times larger than traditional thin silicon films and graphene nanoribbons". The absence of inversion symmetry induces a "strong coupling of spin and valley degrees of freedom", so that 2H-MoS2 is a "good candidate for various valley electronic and optoelectronic applications". Moreover, the strong spin-orbit coupling gives to 2H-MoS2 the possibility of being used in spintronics (see Cao and Chen and references therein).