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Etude de nanojonctions Josephson à haute température critique en vue d'applications térahertz

Abstract : We developed a novel way to design high temperature Josephson junctions using oxygen ion implantation of a high temperature superconductor. These junctions were electrically characterized and theoretically studied using a quasi classical model based on the Usadel equation. Following the development of a measurement set-up in the 4 to 8 GHz frequency range, the microwave mixing properties of these junctions were studied. Results showed a high amplitude non linear term not explained by the common RSJ model (resistively shunted junction). A phenomenological model was developed, based on a non linearity arising from a varying normal resistance, and was successfully compared to experiments. The previous model paves the way for future improvements in the design of these junctions as microwave mixers and detectors.
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https://pastel.archives-ouvertes.fr/pastel-00575929
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Submitted on : Friday, March 11, 2011 - 2:23:57 PM
Last modification on : Saturday, September 26, 2020 - 11:44:08 PM
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  • HAL Id : pastel-00575929, version 1

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Thomas Wolf. Etude de nanojonctions Josephson à haute température critique en vue d'applications térahertz. Science des matériaux [cond-mat.mtrl-sci]. Université Pierre et Marie Curie - Paris VI, 2010. Français. ⟨pastel-00575929⟩

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