Currents in spin-polarized superconductors: Order parameter topology and applications for twisted double-bilayer graphene


  Eyal Cornfeld  ,  Erez Berg  
Weizmann Institute of Science

We present a Ginzburg-Landau model for electric currents in spin-polarized triplet superconductors and find that the order parameter topology forbids the macroscopic formation of supercurrents. Such spin-polarized superconductivity was recently suspected to arise in twisted double-bilayer graphene experiments where our predictions may be applicable to current measurements. We validate our findings using dynamic numerical simulations.