New Paths to Unconventional Topological Superconductivity

          @misc{ pirsa_PIRSA:11110078,
            doi = {10.48660/11110078},
            url = {https://pirsa.org/11110078},
            author = {Thomale, Ronny},
            keywords = {Condensed Matter},
            language = {en},
            title = {New Paths to Unconventional Topological Superconductivity},
            publisher = {Perimeter Institute},
            year = {2011},
            month = {nov},
            note = {PIRSA:11110078 see, \url{https://pirsa.org}}
          }
          

Abstract

We report on our recent progress to investigate materials classes exhibiting d+id superconductivity, where topologically nontrivial pairing phases can emerge. Specifically, motivated by recent experimental progress, we show that graphene doped to the van Hove regime can give rise to a plethora of interesting ordering instabilities such as spin density wave and superconductivity. As a function of system parameters such as doping and range of Coulomb interaction, we explain which instability is favored by the system, and analyze the effect of long-range interactions on superconductivity giving rise to a competition between singlet d+id and triplet f wave. We also outline our work in progress for other materials classes which we believe are promising to stabilize such interesting topological superconducting states of matter.