%0 Journal Article
%A Behner, Gerrit
%A Jalil, Abdur Rehman
%A Grützmacher, Detlev
%A Schäpers, Thomas
%T Superconducting diode effect in selectively grown topological insulator based Josephson junctions
%J Physical review / B
%V 113
%N 3
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2026-01356
%P 035440
%D 2026
%Z Bavarian Ministry of Economic Affairs, Regional Development and Energy within Bavaria's High-Tech Agenda Project ”Bausteine für das Quantencomputing auf Basis Topologischer Materialien mit Experimentellen und Theoretischen Ansätzen” (Grant No. 07 02/686 58/1/21 1/22 2/23)
%X The Josephson diode effect, where the switching current magnitude depends on its direction, arises when both time-reversal and inversion symmetries are broken, often achieved by a combination of spin-orbit interaction and applied magnetic fields. Taking advantage of the strong spin-orbit coupling inherent in three-dimensional topological insulators, we study this phenomenon in Nb/Bi0.8⁢Sb1.2⁢Te3/Nb Josephson weak-link junctions. Under an in-plane magnetic field perpendicular to the current direction, we observe a pronounced Josephson diode effect with efficiencies up to 7%. A crucial component of this behavior is the nonsinusoidal current-phase relationship and an anomalous phase shift, which we attribute to the presence of a ballistic supercurrent component due to the surface states. These findings open up new avenues for harnessing and controlling the Josephson diode effect in topological material systems.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1103/gc7k-rn8q
%U https://juser.fz-juelich.de/record/1053010