Data for: "Superconducting Diode Effect in Selectively-Grown Topological Insulator based Josephson Junctions"doi:10.26165/JUELICH-DATA/EDX1CDJülich DATA2025-11-251Behner, Gerrit; Jalil, Abdur Reman; Grützmacher, Detlev; Schäpers, Thomas, 2025, "Data for: "Superconducting Diode Effect in Selectively-Grown Topological Insulator based Josephson Junctions"", https://doi.org/10.26165/JUELICH-DATA/EDX1CD, Jülich DATA, V1Data for: "Superconducting Diode Effect in Selectively-Grown Topological Insulator based Josephson Junctions"doi:10.26165/JUELICH-DATA/EDX1CDBehner, GerritJalil, Abdur RemanGrützmacher, DetlevSchäpers, ThomasJülich DATASchäpers, ThomasSchäpers, Thomas2025-11-19PhysicsTopological insulators, Josephson diode effectAbstract: 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/Bi0.8Sb1.2Te3/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 non-sinusoidal 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.CC0 Waiver13_SFig9.csvtext/csv1_SFig9.csvtext/csvAll_Data.csvtext/csvFig1.pdfapplication/pdfFig1.pngimage/pngFig2.pdfapplication/pdfFig2.pngimage/pngFig3.pdfapplication/pdfFig3.pngimage/pngFig4.pdfapplication/pdfFig4.pngimage/pngIV_Supp.pdfapplication/pdfIV_Supp.pngimage/pngSFig1.pdfapplication/pdfSFig1.pngimage/pngSFig2.pdfapplication/pdfSFig2.pngimage/pngSFig3.pdfapplication/pdfSFig3.pngimage/pngSFig4.pdfapplication/pdfSFig4.pngimage/pngSFig5.pdfapplication/pdfSFig5.pngimage/pngSFig6.pdfapplication/pdfSFig6.pngimage/pngSFig7.pdfapplication/pdfSFig7.pngimage/png