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4π -periodic supercurrent tuned by an axial magnetic flux in topological insulator nanowires

Fischer, Ralf ; Picó-Cortés, Jordi ; Himmler, Wolfgang ; Platero, Gloria ; Grifoni, Milena ; Kozlov, Dmitriy A. ; Mikhailov, N. N. ; Dvoretsky, Sergey A. ; Strunk, Christoph ; Weiss, Dieter



Abstract

Topological insulator (TI) nanowires in proximity to conventional superconductors have been proposed as a tunable platform to realize topological superconductivity and Majorana zero modes. The tuning is done using an axial magnetic flux φ which allows transforming the system from trivial at φ = 0 to topologically nontrivial when half a magnetic flux quantum φ_0/2 threads the cross-section of ...

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