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001053010 1001_ $$0P:(DE-HGF)0$$aBehner, Gerrit$$b0
001053010 245__ $$aSuperconducting diode effect in selectively grown topological insulator based Josephson junctions
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001053010 500__ $$aBavarian Ministry of Economic Affairs, Regional Development and Energy within Bavaria's High-Tech Agenda Project ”Bausteine für das Quantencomputing auf Basis Topologischer Materialien mit Experimentellen und Theoretischen Ansätzen” (Grant No. 07 02/686 58/1/21 1/22 2/23)
001053010 520__ $$aThe 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.
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001053010 7001_ $$0P:(DE-Juel1)171826$$aJalil, Abdur Rehman$$b1
001053010 7001_ $$0P:(DE-Juel1)125588$$aGrützmacher, Detlev$$b2
001053010 7001_ $$0P:(DE-Juel1)128634$$aSchäpers, Thomas$$b3$$eCorresponding author
001053010 773__ $$0PERI:(DE-600)2844160-6$$a10.1103/gc7k-rn8q$$gVol. 113, no. 3, p. 035440$$n3$$p035440$$tPhysical review / B$$v113$$x2469-9950$$y2026
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