Inductive single-electron transistor

We demonstrate a sensitive method of charge detection based on radio-frequency readout of the Josephson inductance of a superconducting single-electron transistor. Charge sensitivity 1.4 x 10(-4) e/square root Hz, limited by a preamplifier, is achieved in an operation mode which takes advantage of t...

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Bibliographic Details
Published in:Physical review letters 2004-08, Vol.93 (6), p.066805.1-066805.4, Article 066805
Main Authors: SILLANPÄÄ, Mika A, ROSCHIER, Leif, HAKONEN, Pertti J
Format: Article
Language:English
Subjects:
Applied sciences
Design. Technologies. Operation analysis. Testing
Electronics
Exact sciences and technology
Integrated circuits
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting logic elements and memory devices
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Summary:We demonstrate a sensitive method of charge detection based on radio-frequency readout of the Josephson inductance of a superconducting single-electron transistor. Charge sensitivity 1.4 x 10(-4) e/square root Hz, limited by a preamplifier, is achieved in an operation mode which takes advantage of the nonlinearity of the Josephson potential. Owing to reactive readout, our setup has more than 2 orders of magnitude lower dissipation than the existing method of radio-frequency electrometry. With an optimized sample, we expect uncoupled energy sensitivity below variant Planck's over h in the same experimental scheme.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.93.066805