Seminars Archive

Engineering the stability of Unconventional Superconductivity on hexagonal lattices

Abstract
By combining ab initio and Renormalization Group calculations, we investigate competing collective phenomena in germanene on molybdenum disulfide (Ge/MoS₂) [1] and jacutingaite (Pt₂HgSe₃) [2], materials where the van Hove singularity point is close to the Fermi level, and can already be achieved by a moderate electron doping. We find that these systems harbour an interesting class of unconvetional superconducting states depending on the electron doping and interaction profile. Our study indicates that they promise to be prototypical playground to realize superconductivity featuring Cooper pairs with high-angular momentum and possibly topological superconducting orders. [1] D Di Sante, X Wu, M Fink, W Hanke, R Thomale, Physical Review B 99, 201106(R) (2019) [2] X Wu, M Fink, W Hanke, R Thomale, D Di Sante, arXiv:1811.01746 (PRB Rapid Comm in press)