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Shapiro Steps Observed in a Superconducting Single Electron Transistor

並列摘要


The dc current-voltage (Ⅳ) characteristics of a superconducting single electron transistor irradiated with microwaves up to 18 GHz are experimentally studied. The switching current as a function of gate voltage demonstrates clear phase-charge duality in a Josephson junction. At higher microwave power levels, Shapiro steps in Ⅳ characteristics are observed. The step height in Ⅳ can be analyzed using the model an ac-voltage source applied to a single Josephson junction.

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