TY  - JOUR
AU  - Behner, Gerrit
AU  - Jalil, Abdur Rehman
AU  - Grützmacher, Detlev
AU  - Schäpers, Thomas
TI  - Superconducting diode effect in selectively grown topological insulator based Josephson junctions
JO  - Physical review / B
VL  - 113
IS  - 3
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2026-01356
SP  - 035440
PY  - 2026
N1  - 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)
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1103/gc7k-rn8q
UR  - https://juser.fz-juelich.de/record/1053010
ER  -