A topological flux trap: Majorana bound states at screw dislocations

The engineering of non-trivial topology in superconducting heterostructures is a very challenging task. Reducing the number components system would facilitate creation long-sought Majorana bound states. Here, we explore route toward emergent trivial superconductor without need for other proximitized materials. Specifically, show that vortex hosting an even flux quanta capable forming quasi-one-dimensional topological sub-system can be mapped to Kitaev wire, if trapped at screw dislocation. This crystallographic defect breaks inversion symmetry and thereby threads local spin-orbit coupling through superconductor. vortex-dislocation pair otherwise bulk harbor states located two surface terminations. We explain transition terms band Caroli-de Gennes-Matricon discuss favorable material parameters.