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• W3109361307 abstract "We analyze electric transport and noise properties at 4.2 K of self-shunted superconductor-normal metal-superconductor (SNS) sandwich-type Josephson junctions, comprising $mathrm{Nb}$ as the superconductor and $mathrm{Hf}$-$mathrm{Ti}$ as the normal conducting material, with lateral dimensions down to approximately $80$ nm. The junctions are fabricated with an optimized multilayer $mathrm{Nb}$ technology based on nanopatterning by electron-beam lithography and chemical-mechanical polishing. The dependence of transport properties on the junction geometry (lateral size and barrier thickness ${d}_{mathrm{Hf}mathrm{ensuremath{-}}mathrm{Ti}}$) is studied, yielding a characteristic voltage ${V}_{c}$ up to approximately $100phantom{rule{0.2em}{0ex}}ensuremath{mu}mathrm{V}$ for the smallest ${d}_{mathrm{Hf}mathrm{ensuremath{-}}mathrm{Ti}}=17$ nm. The observed small hysteresis in the current-voltage curves of devices with high ${V}_{c}$ and large size can be attributed to self-heating of the junctions and fitted with an extended version of the resistively shunted junction model. Measurements of voltage noise of single junctions are consistent with the model including self-heating effects. The potential of our technology for further miniaturization of nanoscale superconducting quantum interference devices and for the improvement of their performance is discussed." @default.
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• W3109361307 date "2020-11-30" @default.
• W3109361307 modified "2023-10-18" @default.
• W3109361307 title "Transport and Noise Properties of sub-100-nm Planar <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Nb</mml:mi></mml:math> Josephson Junctions with Metallic <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Hf</mml:mi></mml:math> - <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline overflow=scroll><mml:mi>Ti</mml:mi></mml:math> Barriers for nano-SQUID Applications" @default.
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• W3109361307 doi "https://doi.org/10.1103/physrevapplied.14.054072" @default.
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