Magnetic manipulation of topological states in $p$-wave superconductors.

Mercaldo M.T., Cuoco M., Kotetes P.
  Venerdì 15/09   09:00 - 12:00   Aula A224   II - Fisica della materia
We investigate the impact of an applied Zeeman field on the Cooper pair's spin-structure, as related to the $d$-vector, and the resulting thermodynamic and topological properties of a spin-triplet superconductor. We focus on a one-dimensional system by showing how the $d$-vector undergoes a significant angular and amplitude reorganization upon the variation of the strength and the orientation of the field. Remarkably, when addressing the open chain we find that the orientation of the $d$-vector varies spatially near the boundary, affecting in this manner the appearance of Majorana modes at the edge or even altering the properties of the bulk region.