Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 28: Poster Session: Topological Topics
TT 28.14: Poster
Montag, 12. März 2018, 15:00–19:00, Poster B
Tunable quasiparticle poisoning in Josephson Junctions — •Daniel Frombach1 and Patrik Recher1,2 — 1Institut für Mathematische Physik, TU Braunschweig — 2Laboratory for Emerging Nanometrology Braunschweig
The fractional Josephson effect is one of the unique features of Majorana bound states (MBS) forming in Josephson junctions [1]. However, its experimental realization still remains challenging partially due to quasiparticle poisoning potentially spoiling the 4π periodic effect. Despite first signatures of the 4π periodicity having been reported [2][3], the effect of such quasiparticle poisoning is still not well understood.
Here we propose a setup based on silicene, in which an experimental handle in the form of a perpendicular electric field exists, with which it can be possible to introduce an artificial poisoning experienced by the MBS. We analyze the poisoning effect on the current voltage characteristic of the junction and discuss the critical current as a possible indicator for the topology of the junction.
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