Quantized current of a hybrid single-electron transistor with superconducting leads and a normal-metal island

Details Quantized current of a hybrid single-electron transistor with superconducting leads and a normal-metal island Quantized current of a hybrid single-electron transistor with superconducting leads and a normal-metal island

2008-03-11

arxiv.org/abs/0803.1563v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 9 figures; Text edited, one new figure added, references updated

Scientific paper

We discuss the operation of the superconductor - insulator - normal-metal - insulator - superconductor (SINIS) turnstile. This voltage-biased hybrid single-electron transistor (SET) provides current quantization even with only one radio-frequency (rf) control parameter, namely the gate voltage of the single island. We give an overview of the main error mechanisms of the turnstile and consider its feasibility as a quantum current standard. We also present experimental results of pumping with the SINIS structure which show decreased leakage current compared to earlier measurements with the opposite NISIN structure.

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