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001046008 1001_ $$0P:(DE-Juel1)144210$$aGundareva, Irina$$b0$$eFirst author$$ufzj
001046008 245__ $$aInduced superconductivity in hybrid Au/YBa2Cu3O7−x electrodes on vicinal substrates
001046008 260__ $$a[London]$$bSpringer Nature$$c2025
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001046008 520__ $$aSuperconducting electrodes are an integral part of hybrid Josephson junctions used in many applications including quantum technologies. We report on the fabrication and characterization of superconducting hybrid Au/YBa2Cu3O7−x (YBCO) electrodes on vicinal substrates. In these structures, superconducting CuO2-planes face the gold film, resulting in a higher value and smaller variation of the induced energy gap compared to conventional Au/YBCO electrodes based on films with the c-axis normal to the substrate surface. Using scanning tunneling microscopy, we observe an energy gap of about 10–17 meV at the surface of the 15- nm-thick gold layer deposited in situ atop the YBCO film. To study the origin of this gap, we fabricate nanoconstrictions from the Au/YBCO heterostructures and measure their electrical transport characteristics. The conductance of the nanoconstrictions shows a series of dips due to multiple Andreev reflections in YBCO and gold, providing clear evidence of the superconducting nature of the gap in gold. We consider the Au/YBCO electrodes to be a versatile platform for hybrid Josephson devices with a high operating temperature.
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001046008 7001_ $$0P:(DE-HGF)0$$aMartinez-Castro, Jose$$b1
001046008 7001_ $$0P:(DE-Juel1)128791$$aTautz, Frank Stefan$$b2$$ufzj
001046008 7001_ $$0P:(DE-Juel1)128617$$aMussler, Gregor$$b3$$ufzj
001046008 7001_ $$0P:(DE-Juel1)171826$$aJalil, Abdur Rehman$$b4$$ufzj
001046008 7001_ $$0P:(DE-Juel1)165589$$aHou, Xiao$$b5$$ufzj
001046008 7001_ $$0P:(DE-Juel1)125588$$aGrützmacher, Detlev$$b6$$ufzj
001046008 7001_ $$0P:(DE-Juel1)128634$$aSchäpers, Thomas$$b7$$ufzj
001046008 7001_ $$0P:(DE-Juel1)180691$$aLyatti, Matvey$$b8$$eCorresponding author$$ufzj
001046008 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/s41598-025-17434-y$$gVol. 15, no. 1, p. 32282$$n1$$p32282$$tScientific reports$$v15$$x2045-2322$$y2025
001046008 8564_ $$uhttps://www.nature.com/articles/s41598-025-17434-y
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