Shapiro Step Response of Intrinsic Josephson Junctions With High Critical Currents of ${({\rm Bi}_{1-{\rm x}}{\rm Pb}_{\rm x})}_{2}{\rm Sr}_{2}{\rm CaCu}_{2}{\rm O}_{\rm y}$

Othman, Norzila; Oya, Gin‐ichiro; Kitamura, Michihide; Irie, Atsushi

doi:10.1109/tasc.2010.2091248

Cited by 2 publications

(1 citation statement)

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“…1I, inset) before jumping about 20 mV to the resistive state at the critical current I C , marked by the blue triangle. The small voltage rise at I C1 was previously seen in some IJJs (16,36,37) and was attributed to self-field effects (16,38), whereas the V jump at I C is comparable in magnitude to the corresponding jump in IJJs (16,39,40). Upon reversing the bias current polarity (dashed line), the JJ's I-V behavior is mirrored along I = 0.…”

Section: Building Twisted Bscco Junctionsmentioning

confidence: 55%

Time-reversal symmetry breaking superconductivity between twisted cuprate superconductors

Zhao,

Cui,

Volkov

et al. 2023

Science

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Twisted interfaces between stacked van der Waals (vdW) cuprate crystals present a platform for engineering superconducting order parameters by adjusting stacking angles. Using a cryogenic assembly technique, we construct twisted vdW Josephson junctions (JJs) at atomically sharp interfaces between Bi 2 Sr 2 CaCu 2 O 8+ x crystals, with quality approaching the limit set by intrinsic JJs. Near 45° twist angle, we observe fractional Shapiro steps and Fraunhofer patterns, consistent with the existence of two degenerate Josephson ground states related by time-reversal symmetry (TRS). By programming the JJ current bias sequence, we controllably break TRS to place the JJ into either of the two ground states, realizing reversible Josephson diodes without external magnetic fields. Our results open a path to engineering topological devices at higher temperatures.

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Section: Building Twisted Bscco Junctionsmentioning

confidence: 55%