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TT: Fachverband Tiefe Temperaturen

TT 55: Topology and Symmetry Protected Materials (joint session O/TT)

TT 55.11: Talk

Wednesday, March 20, 2024, 17:30–17:45, HL 001

Boundary-induced delocalization of vortices in the topological superconductor — •Qiao-Yan Yu — Shanghai Jiao Tong University, Shanghai, China

Planar defects are predicted to induce a delocalization of Abrikosov vortices in superconductors. These delocalized vortices are perturbated by the supercurrent and thus might carry a fraction of a flux quantum. In this work, we constructed a topological superconductor heterostructure by growing Bi2Te3 thin films with molecular beam epitaxy on the superconductor NbSe2. We reveal that the domain boundary induced partial spatial distribution of vortex and screened in-gap bound states within the vortex which crossing the boundary. Our results show the signature of impact of domain boundary on the Majorana zero mode.

Keywords: domain boundary; vortex; delocalization; topological superconductor